Anime Guardians Update 21 Guide – New Codes, Units, Christmas Event & More

Anime Guardians Update 21 brings back the Christmas event with a large amount of new content that directly affects both casual and endgame players. This update introduces brand new units, limited capsules, fresh game modes, and several quality-of-life improvements that make grinding and unit management easier than before. If you are planning to farm the event or aim for secret units, this guide breaks down everything you need to know in one place.

What’s New in Anime Guardians Update 21

Update 21 focuses heavily on Christmas Return content and the Re:Zero lineup. In total, 11 new units have been added, including evolutions and multiple secret-tier characters.

New Units List

• Subaru (Greed) – Secret
• Subaru (Pride) – Secret
• Subaru (Gluttony) – Secret
• Reinhard (Strongest Human) – Limited
• Regulus (Alpha Leonis) – Secret
• Minerva (Witch of Wrath) – Secret
• Typhon (Witch of Pride) – Secret
• Daphne (Witch of Gluttony) – Secret
• Carmillia (Witch of Lust) – Secret
• Sekhmet (Witch of Sloth) – Secret

Most of the new units are locked behind event modes and limited capsules, making this update very grind-focused.

Christmas Event Game Modes Explained

City of Shattered Forest (Infinite Mode)

This is an endless wave mode where enemies grow stronger over time. The longer you survive, the better the rewards.

The key feature here is the Modifier Card Shop, which lets you buy buffs infinitely.

Modifier Cards

• Golden Tribute: +2,500 Yen per wave
• Power Surge: +5% ATK, +2% SPA, +2% RNG, +5% Critical Chance
• Saiya: Each attack increases your own damage by 0.8%
• Time Snare: Enemies lose walk speed and skill cooldown is reduced

This mode is best for long sessions and players with strong units.

Priestella (30 Waves)

In this mode, you must protect Reinhard (Strongest Human) while clearing waves.

• 30 total waves
• If Reinhard is defeated, the run fails
• Main source of evolution materials and unit drops

Team placement and crowd control are very important here.

Roswaal Mansion (30 Waves)

This mode introduces three lanes that split into two, making positioning more complex.

• All enemies have God Shield
• Requires shield-breaking or sustained damage
• Good source of late-game materials

This mode is harder than Priestella and better suited for experienced players.

New Christmas Capsules (Event Shop)

Update 21 adds Christmas Capsules, which contain limited and secret units.

Capsule Highlights

• Reinhard (Strongest Human) – Limited (0.09% drop rate)
• Regulus, Minerva, Typhon, Daphne, Carmillia, Sekhmet – Secret

These capsules use Christmas event currency, so efficient farming is important.

God Shield – New Enemy Mechanic

God Shield is one of the biggest gameplay changes in this update.

God Shield Effects

• Reduces incoming damage by 70%
• When hit, enemies heal 10% of the shield value

This mechanic forces players to rethink team composition and focus on sustained DPS instead of burst-only units.

Quality of Life Improvements

Update 21 also adds many helpful changes:

• New map selection images
• New capsule visuals
• New cutscenes
• New icons and bundles
• New Christmas currency
• New daily rewards
• Artifacts can now be equipped directly from inventory

These changes make progression smoother and reduce menu clutter.

Anime Guardians Update 21 Codes – Are There Any?

• UPD21
• REINHARDTO
• CHRISTMAS
• REZERO_PART2

Also check out our Anime Guardians Codes list for more redeemable rewards!

Anime Guardians Update 21 is one of the most content-packed updates so far, especially for players who enjoy event grinding and rare unit hunting. With multiple game modes, secret-heavy banners, and the new God Shield mechanic, this update rewards preparation and team planning more than raw luck. If you are aiming for limited units like Reinhard or any of the Witch secrets, focus on event modes early and manage your currency carefully. Whether you are farming infinite waves or clearing 30-wave stages, Update 21 gives plenty of reasons to jump back into Anime Guardians and push your roster further.