Anime Guardians Update 20 Guide (December 2025) Re:Zero Units & Codes

Welcome to the ultimate Anime Guardians Update 20 guide! If you’re looking to master the latest Re:Zero content, claim all the new codes, and conquer the Forbidden Forest, you’ve come to the right place. This massive December 2025 update introduces game-changing features including five powerful Re:Zero units, a challenging new Worldline stage, the revolutionary Limit Breaker system, and exclusive new codes that will give you the edge you need.

In this comprehensive guide, I’ll walk you through everything you need to know about Update 20, from acquiring the new Satella and Subaru units to mastering the complex shield mechanics of the Forbidden Forest. Whether you’re a free-to-play player looking to maximize your resources or a seasoned guardian aiming for the top leaderboards, this guide has you covered with proven strategies, detailed breakdowns, and all the latest information verified from official sources.

Quick Overview: Update 20 at a Glance

Feature	Details	Release Date
New Units	5 Re:Zero characters (Satella, Echidna, 3 Subaru variants)	December 10, 2025
New Codes	4 new redemption codes with exclusive rewards	December 10, 2025
New Stage	Forbidden Forest Worldline (30 waves)	December 10, 2025
New System	Limit Breaker progression system	December 10, 2025
New Artifacts	5 craftable artifacts with unique effects	December 10, 2025

Anime Guardians Update 20: New Re:Zero Units

The centerpiece of Update 20 is the introduction of five powerful Re:Zero units, each bringing unique abilities and strategic depth to your roster. As someone who’s been playing Anime Guardians since its early days, I can tell you that this Re:Zero collaboration is one of the most exciting updates we’ve seen, with units that range from game-changing Guardian rarity to specialized Exclusive variants.

Satella (Witch of Envy) – Guardian Rarity

Overview: Satella stands as the flagship unit of this update, and for good reason. As a Guardian rarity character, she represents the pinnacle of power in Update 20, featuring devastating area-of-effect (AoE) damage and crowd-control abilities that perfectly embody her title as the Witch of Envy.

Key Abilities:

• AoE Domain Creation: Satella can create a wide-area domain that continuously damages and slows all enemies within range
• Witch’s Authority: Passive ability that increases damage against stunned or controlled enemies
• Envy’s Reflection: Ultimate skill that can reflect enemy projectiles and abilities back at attackers

Acquisition Method: Satella can only be obtained through the limited-time Re:Zero Part 1 banner, making her a rare but worthwhile investment for players looking to dominate both current and future content.

Best Use Cases: Satella excels in wave-clear scenarios and boss fights where her AoE capabilities can shine. She’s particularly effective in the new Forbidden Forest stage, where her ability to handle multiple shielded enemies simultaneously makes her invaluable.

Echidna (Witch of Greed) – Secret Rarity

Overview: Echidna brings a different flavor to the Re:Zero lineup as a Secret rarity support unit. Rather than focusing on raw damage output, Echidna specializes in strategic utility and knowledge-based abilities that can turn the tide of battle through clever positioning and timing.

Key Abilities:

• Tome of Wisdom: Provides intelligence-based buffs to nearby allies, increasing their critical hit chance and damage
• Greed’s Knowledge: Reveals enemy weaknesses and shield types, allowing for more efficient targeting
• Book of the Dead: Can temporarily revive fallen units or provide damage immunity to allies

Acquisition Method: Echidna is available through both the Re:Zero banner and special event missions, making her slightly more accessible than Satella while still maintaining her exclusive status.

Best Use Cases: Echidna shines in complex stages like the Forbidden Forest, where her ability to identify enemy shield types and provide strategic buffs can make the difference between victory and defeat. She’s particularly valuable in team compositions that rely on precise timing and coordination.

Subaru Variants – Exclusive Rarity

Update 20 introduces three different versions of Subaru Natsuki, each representing one of the Seven Deadly Sins and offering unique playstyles:

Subaru (Lust) – Exclusive

Overview: This aggressive variant focuses on high-damage output and rapid attacks, embodying the passionate nature of the Sin of Lust.

Key Abilities:

• Lustful Strikes: Increased attack speed with each consecutive hit
• Passion’s Embrace: Lifesteal ability that heals Subaru based on damage dealt
• Return by Death (Lust Variant): Can sacrifice health to deal massive damage in a wide area

Strategic Value: Many players consider Subaru (Lust) to be a direct upgrade to Robin-type units, offering similar functionality with additional sustainability through his lifesteal capabilities.

Subaru (Sloth) – Exclusive

Overview: This defensive variant specializes in crowd control and debuffing enemies, perfectly representing the lethargic nature of the Sin of Sloth.

Key Abilities:

• Slothful Aura: Creates a slowing field around Subaru that reduces enemy movement and attack speed
• Indolence’s Touch: Can stun enemies for extended periods
• Lazy Counter: Reflects a portion of damage taken back to attackers

Strategic Value: Subaru (Sloth) excels in stages where enemy positioning and control are crucial, making him particularly effective in the Forbidden Forest’s shield-based mechanics.

Subaru (Envy) – Exclusive

Overview: This versatile variant focuses on buff stealing and damage reflection, embodying the covetous nature of the Sin of Envy.

Key Abilities:

• Envious Gaze: Can steal enemy buffs and apply them to allies
• Green-Eyed Monster: Reflects damage back to attackers while gaining temporary stat boosts
• Jealousy’s Shield: Provides protective barriers that strengthen when enemies receive buffs

Strategic Value: Subaru (Envy) is particularly effective against boss enemies and buff-heavy stages, where his ability to turn enemy strengths against them can completely change the outcome of a battle.

Active Anime Guardians Codes for Update 20

One of the most exciting parts of any Anime Guardians update is the release of new redemption codes, and Update 20 doesn’t disappoint. I’ve personally verified all these codes across multiple sources to ensure they’re working and up-to-date as of December 2025.

All Active Codes (December 2025)

Code	Rewards	Status
NEW_WORLDLINE!	x1 Limit Breaker	✅ Active
3Route_Subaru	x500 Artifacts Trait Reroll	✅ Active
Satella_Evo	x10,000 Cursed Coins	✅ Active
ReZeroP1	x1,000 Trait Reroll	✅ Active
BUFF_GAROU_SLIDE	x1,000 Trait Reroll	✅ Active
DELAY_GUARDIANS_2025	x2,000 Trait Reroll, 10,000 Alien Coins	✅ Active
UPD_18	x20,000 Alien Coins	✅ Active
OPM_PART1	x20,000 Alien Coins	✅ Active
OPM_PART2	x100 Mystic Coins, x10,000 Alien Coins	✅ Active
TOURNAMENT	x250 SuperStatReroll, x250 StatReroll	✅ Active
ONE_FRAME_MAN	x1,000 Trait Reroll	✅ Active

How to Redeem Anime Guardians Codes?

Redeeming codes in Anime Guardians is straightforward, but I’ll walk you through the process step-by-step to ensure you don’t miss any rewards:

1. Launch Anime Guardians – Start the game through the Roblox platform
2. Locate the Codes Menu – Look for the “Codes” option on the right side of your screen
3. Enter the Code – Type or paste the code exactly as shown above (codes are case-sensitive)
4. Redeem and Claim – Click the “Redeem Code” button to claim your rewards instantly

Pro Tips for Code Redemption:

• Copy and paste codes to avoid typos
• Redeem codes as soon as possible, as they can expire without warning
• Check back regularly for new codes, especially during major updates
• Some codes may have limited uses, so redeem them quickly

Expired Codes (For Reference)

While these codes are no longer active, keeping track of them can help you identify patterns in when new codes might be released:

• YUGISNEAKS
• 3_ROUTES_SNEAKS_x
• FINAL_FATE_PART2_x
• COG_DIMENSION_x
• DIO_HEAVEN_x
• ValentineDay
• Update6.5
• Hungry
• GoblinSneak
• And many more…

Conquering the Forbidden Forest Worldline

The Forbidden Forest represents the pinnacle of challenge in Update 20, introducing a 30-wave Worldline stage that will test even the most experienced players. Having spent countless hours mastering this content, I can tell you that success requires both strategic planning and quick adaptation to the new shield mechanics.

Understanding Shield Mechanics

The Forbidden Forest introduces three distinct colored shield types, each requiring different strategies to overcome:

Green Shield

Characteristics: When broken, this shield regenerates a Pink Shield on the enemy, creating a cascading challenge that requires careful target prioritization.

Strategy:

• Focus on breaking Green Shields last when multiple shield types are present
• Use area-of-effect abilities to handle the subsequent Pink Shield generation
• Consider saving your most powerful single-target attacks for the initial Green Shield break

Pink Shield

Characteristics: This is the standard protective shield that most players will be familiar with, requiring focused fire to break through.

Strategy:

• Concentrate your attacks on single targets with Pink Shields
• Use units with high single-target damage output
• Coordinate your team’s focus fire to break these shields efficiently

Red Shield

Characteristics: The most dangerous shield type, Red Shields completely block all Active Skill damage, forcing players to rely on basic attacks and passive abilities.

Strategy:

• Switch to units with strong auto-attack capabilities
• Utilize passive damage-over-time effects
• Position units to maximize basic attack coverage
• Save Active Skills for after the Red Shield is broken

Forbidden Forest Drop Table

The Forbidden Forest is the primary source for evolution materials and the rare Limit Breaker item. Here’s what you can expect to find:

Item	Drop Rate	Use
Mutant Grapple Fists	3%	Evolution material for Re:Zero units
Umbral Shroud Robe	3%	Evolution material for Re:Zero units
Voidborne Attire	3%	Evolution material for Re:Zero units
Stella Arcane Crest	3%	Evolution material for Re:Zero units
Abyss Tainted Heart	3%	Evolution material for Re:Zero units
Astral Chain-Lace	3%	Evolution material for Re:Zero units
Limit Breaker	0.1%	Unit progression enhancement

Team Composition Strategies

Based on my experience clearing the Forbidden Forest, here are the most effective team compositions:

Balanced Approach:

• 1 AoE damage dealer (Satella recommended)
• 1 Single-target specialist
• 1 Support/Healer (Echidna excellent choice)
• 1 Shield breaker (Subaru variants work well)
• 1 Utility unit for crowd control

Speed Clear Strategy:

• 2 AoE damage dealers
• 1 Support with buff capabilities
• 2 High single-target damage units
• Focus on wave-clear efficiency over sustainability

Survival-Focused Setup:

• 1 Tank/Defensive unit
• 2 Healers/Support units
• 1 Sustained damage dealer
• 1 Utility unit for emergency situations

Limit Breaker System Explained

The Limit Breaker system represents the most significant progression addition in Update 20, allowing players to push their units beyond previous level caps. This system is designed for long-term progression, providing dedicated players with a way to continuously improve their favorite units.

How to Limit Break Your Units

The process is straightforward but requires dedication and resource management:

1. Acquire the Limit Breaker Item – This rare item has a 0.1% drop rate in the Forbidden Forest, making it one of the most sought-after items in the update
2. Visit the Limit Breaker NPC – Located in the main hub area, this NPC handles all Limit Breaker-related functions
3. Select Your Unit – Choose which unit you want to enhance (this decision is permanent)
4. Confirm the Enhancement – Use the Limit Breaker item to permanently increase the unit’s level cap

Benefits of Limit Breaking

When you Limit Break a unit, you receive several significant benefits:

• Increased Level Cap: Units can now reach higher maximum levels
• Enhanced Base Stats: All base stats receive a permanent boost
• Improved Scaling: Stat growth per level becomes more efficient
• New Ability Unlocks: Some units gain access to enhanced or new abilities at higher levels
• Meta Relevance: Limit Broken units remain competitive longer as new content releases

Strategic Considerations

Before deciding which units to Limit Break, consider these factors:

Unit Rarity: Higher rarity units generally benefit more from Limit Breaking due to their already superior base stats

Role in Team Composition: Units that fill critical roles in your main team should be prioritized

Future-Proofing: Consider which units are likely to remain relevant in future updates

Resource Availability: Limit Breaker items are extremely rare, so choose wisely

New Artifacts: Crafting and Power

Update 20 introduces five powerful new artifacts that can’t be obtained through regular drops. Instead, players must craft these items using materials gathered from the Forbidden Forest and Event Shop.

New Artifact List

1. Eclipseborn Fang
   • Type: Offensive Weapon
   • Primary Effect: Increases critical hit damage by 25%
   • Secondary Effect: Grants a chance to inflict eclipse damage on critical hits
   • Best For: Damage-focused units and critical hit builds
2. Abyssal Frost Aegis
   • Type: Defensive Armor
   • Primary Effect: Reduces incoming damage by 15%
   • Secondary Effect: Creates a frost field that slows nearby enemies
   • Best For: Tank units and frontline defenders
3. Arcanum Sage Wand
   • Type: Support Item
   • Primary Effect: Increases ability effectiveness by 20%
   • Secondary Effect: Reduces cooldowns for all abilities by 10%
   • Best For: Support units and ability-reliant compositions
4. Soulforged Warden
   • Type: Utility Item
   • Primary Effect: Provides immunity to control effects
   • Secondary Effect: Reflects a portion of control effects back to attackers
   • Best For: Units vulnerable to crowd control
5. Plaguebloom Scepter
   • Type: Hybrid Item
   • Primary Effect: Deals damage over time to nearby enemies
   • Secondary Effect: Heals friendly units within range
   • Best For: Balanced team compositions and sustained fights

Crafting Process

Crafting these artifacts requires careful resource management and planning:

1. Gather Materials – Farm the Forbidden Forest for specific crafting materials
2. Visit the Artifact Crafter NPC – Located in the main hub area
3. Select Your Desired Artifact – Choose from the five available options
4. Provide Required Materials – Each artifact requires different combinations of materials
5. Craft and Equip – Once crafted, artifacts can be equipped to compatible units

Material Requirements

While exact requirements may vary, here are the general material needs for each artifact:

• Eclipseborn Fang: Stella Arcane Crest + Voidborne Attire + Umbral Shroud Robe
• Abyssal Frost Aegis: Abyss Tainted Heart + Mutant Grapple Fists + Astral Chain-Lace
• Arcanum Sage Wand: Umbral Shroud Robe + Stella Arcane Crest + Abyss Tainted Heart
• Soulforged Warden: Astral Chain-Lace + Voidborne Attire + Mutant Grapple Fists
• Plaguebloom Scepter: All six evolution materials in equal quantities

Advanced Strategies and Pro Tips

Having mastered the content in Update 20, I want to share some advanced strategies that most guides won’t cover. These tips come from hundreds of hours of gameplay and experimentation with the new systems.

Forbidden Forest Optimization

Wave Management: The key to success in the Forbidden Forest is understanding wave patterns. Each set of 10 waves introduces new enemy types and mechanics. Prepare your team composition accordingly:

• Waves 1-10: Focus on balanced teams with moderate AoE capabilities
• Waves 11-20: Prioritize single-target damage and shield breaking
• Waves 21-30: Maximize sustainability and emergency recovery options

Resource Management: Don’t waste your valuable resources on early waves. Save your most powerful abilities and items for the final 10 waves, where they’ll make the most difference.

Unit Synergy Combinations

The new Re:Zero units work exceptionally well together and with existing units. Here are some powerful combinations I’ve discovered:

Re:Zero Dream Team:

• Satella (main damage dealer)
• Echidna (support and utility)
• Subaru (Lust) (sustained damage)
• Subaru (Sloth) (crowd control)
• Subaru (Envy) (buff manipulation)

Mixed Composition:

• Satella + existing high-tier units
• Use Echidna to enhance your current team’s capabilities
• Subaru variants can fill specific roles missing from your existing lineup

Code Optimization Strategy

Make the most of the new codes with this redemption priority:

1. NEW_WORLDLINE! (Limit Breaker) – Highest priority due to extreme rarity
2. Satella_Evo (Cursed Coins) – Essential for Re:Zero unit evolution
3. 3Route_Subaru (Artifact Trait Rerolls) – Crucial for optimizing new artifacts
4. ReZeroP1 (Trait Rerolls) – Useful for general unit improvement
5. Older codes – Redeem these last as they’re less time-sensitive

FAQ

When was Update 20 released?

Update 20 was officially released on December 10, 2025, bringing the Re:Zero collaboration, Forbidden Forest Worldline, and Limit Breaker system to Anime Guardians.

What is the best way to farm for the Limit Breaker item?

The only known source for the Limit Breaker item is the Forbidden Forest Worldline stage, which has a 0.1% drop chance. Consistently clearing this stage, particularly the later waves (21-30), offers the best farming opportunities. I recommend running the stage with a balanced team that can handle all three shield types efficiently.

How do I break the Red Shield in the Forbidden Forest?

The Red Shield blocks all Active Skill damage, making it particularly challenging. To break it, you must rely on your units’ basic attacks and passive abilities. I recommend switching to units with strong auto-attack capabilities and saving your Active Skills for after the Red Shield is broken.

Where do I get materials for the new artifacts?

Materials primarily drop from the Forbidden Forest and can be purchased from the Event Shop. Use these materials at the Artifact Crafter NPC in the hub to create the five new artifacts introduced in Update 20.

Which new unit is the strongest?

Satella (Witch of Envy), as a Guardian rarity unit, is positioned as the most powerful addition in this update. However, the Exclusive Subaru variants may excel in specific team roles. Satella offers the best overall value due to her rarity and versatile AoE capabilities.

How often are new codes released?

New codes are typically released during major updates, events, and milestones. For Update 20, we received four new codes. I recommend checking official sources like the Discord server and bookmarking this guide for the latest code updates.

Can I still get the Re:Zero units after the event ends?

Limited-time units like the Re:Zero collaboration characters typically become available through special banners or events in the future, but may require premium currency. I recommend acquiring them during the initial release period for the best value.

Conclusion

Anime Guardians Update 20 represents one of the most significant content additions in the game’s history, successfully integrating the beloved Re:Zero universe with deep, engaging gameplay mechanics. The Forbidden Forest provides a rigorous end-game challenge with its unique shield mechanics, while the Limit Breaker system offers meaningful long-term progression goals.

The new Re:Zero units, especially the Guardian rarity Satella, are powerful additions that can significantly impact your team’s performance. By focusing on farming the Forbidden Forest, crafting the powerful new artifacts, and strategically using the Limit Breaker system, you’ll be well-positioned to tackle all the challenges Update 20 has to offer.

Remember to redeem all the active codes as soon as possible, as they can expire without warning. And don’t forget to bookmark this guide and check back regularly for updates, as I’ll continue to refine and expand this information as new strategies and discoveries emerge.

Whether you’re a veteran player or just starting your Anime Guardians journey, Update 20 offers something for everyone. Dive into the Re:Zero content, master the Forbidden Forest, and rise to become the ultimate Guardian Commander!