Anime Guardians Update 20 marks a major expansion into the beloved Re:Zero universe. Released on December 10, 2025, this update introduces a slew of new content, from powerful characters to challenging stages and a game-changing progression system. Whether you’re here for the new Re:Zero units or to conquer the Forbidden Forest, this guide covers everything you need to know about Update 20.
New Re:Zero Units & How to Get Them
Update 20: Re:Zero Part 1 introduces five new units, spanning multiple rarity tiers. These characters bring unique abilities and skills to your roster.
Satella (Witch of Envy) – Guardian: The flagship unit of this update. Satella is a formidable Guardian rarity character expected to have high area-of-effect (AoE) damage and crowd-control abilities befitting her title.
Echidna (Witch of Greed) – Secret: A Secret rarity unit. Echidna will likely offer strong support or strategic utility, potentially revolving around knowledge or resource manipulation.
Subaru (Lust) – Exclusive: An Exclusive rarity variant of Subaru. This version may focus on aggressive, high-damage output.
Subaru (Sloth) – Exclusive: Another Exclusive variant, potentially with abilities that slow, stun, or debuff enemies, embodying the Sin of Sloth.
Subaru (Envy) – Exclusive: The third Exclusive Subaru, which might feature skills that steal enemy buffs or reflect damage, themed around envy.
Acquisition: These new units are typically obtained through a limited-time event banner, special summons, or via event shops using currencies earned from the new stage and event missions.
Conquering the Forbidden Forest Worldline
A brand-new Worldline stage, the Forbidden Forest, is the centerpiece of Update 20. This challenging area consists of 30 waves of powerful enemies and introduces new mechanics.
Key Mechanics & Shield Types:
The Forbidden Forest features enemies with three distinct colored shields that require specific strategies to break:
Green Shield: When broken, this shield regenerates a Pink Shield on the enemy. Prioritize targets wisely.
Pink Shield: A standard protective shield. Focus fire to break through it.
Red Shield: The most dangerous shield type. It completely blocks all Active Skill damage. To break it, you must rely on your units’ basic attacks and passive abilities.
Forbidden Forest Drop Table:
This stage is the primary source for evolution materials for the new Re:Zero units and for crafting new artifacts. Here are the drop rates for key items:
Mutant Grapple Fists (3%)
Umbral Shroud Robe (3%)
Voidborne Attire (3%)
Stella Arcane Crest (3%)
Abyss Tainted Heart (3%)
Astral Chain-Lace (3%)
Limit Breaker (0.1%)
New Artifacts: Crafting and Power
Update 20 adds five powerful new artifacts, but they are not direct drops. You must craft them using the Artifact Crafter NPC.
New Artifacts List:
Eclipseborn Fang
Abyssal Frost Aegis
Arcanum Sage Wand
Soulforged Warden
Plaguebloom Scepter
How to Craft: Gather specific materials from the Forbidden Forest and the Event Shop. Visit the Artifact Crafter in the hub to select and create the artifact you desire. Each artifact will provide unique stat boosts and potent effects tailored to different unit roles.
Limit Breaker System Explained
The Limit Breaker NPC introduces a new progression layer, allowing you to increase a unit’s maximum level beyond its previous cap.
How to Limit Break:
Acquire the rare Limit Breaker item (primary source: Forbidden Forest with a 0.1% drop rate).
Visit the Limit Breaker NPC in the game world.
Select the unit you wish to empower and use the item.
This process will permanently raise the unit’s level cap, significantly boosting its base stats and power.
Active Redeem Codes for Update 20
Redeem these codes in-game for free rewards like gems, summons, or evolution materials. Codes are often case-sensitive and may expire.
NEW_WORLDLINE!
3Route_Subaru
Satella_Evo
ReZeroP1
How to Redeem: Go to the game’s official menu or website, find the “Redeem Code” section, enter the code exactly as shown, and claim your rewards.
FAQ: Anime Guardians Update 20
Q: When was Update 20 released?
A: Update 20 was released on December 10, 2025.
Q: What is the best way to farm for the Limit Breaker item?
A: The only known source is the Forbidden Forest Worldline stage, which has a 0.1% drop chance. Consistently clearing this stage is the recommended method.
Q: How do I break the Red Shield in the Forbidden Forest?
A: The Red Shield blocks all Active Skill damage. You must use your units’ basic attacks and passive abilities to break it.
Q: Where do I get materials for the new artifacts?
A: Materials primarily drop from the Forbidden Forest and can be purchased from the Event Shop. Use these materials at the Artifact Crafter NPC.
Q: Which new unit is the strongest?
A: 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.
Conclusion
Anime Guardians Update 20 successfully integrates the Re:Zero world with substantial gameplay depth. The Forbidden Forest provides a rigorous end-game challenge with its unique shield mechanics, while the Limit Breaker system offers long-term progression goals. The new Re:Zero units, especially the Guardian rarity Satella, are powerful additions to any team. Focus on farming the Forbidden Forest to gather evolution materials, craft the powerful new artifacts, and chase the rare Limit Breaker item to maximize your squad’s potential.