Anime Guardians Update 21 Guide (June 2026) Re:Zero Units & Codes
The holiday season has brought a massive content drop to Anime Guardians with Update 21. This update combines the festive spirit of the Christmas Event with the dark fantasy world of Re:Zero, introducing a meta-shifting roster of units and challenging new game modes. Tower defense games like Anime Guardians can become extremely resource-intensive during high-wave runs, especially with the new visual effects from the Re:Zero units. To prevent crashing during a crucial Infinite Mode run, playing on a gaming laptop with high RAM or a powerful smartphone is highly recommended to handle the entity count lag.
Key Information Summary
| Feature | Details |
|---|---|
| Update Name | Update 21 + Christmas Event |
| Main Theme | Re:Zero Crossover |
| New Units | Reinhard, Subaru (3 forms), Regulus, The Witches |
| New Mechanic | God Shield |
| Event Currency | Christmas Coins |
| Gacha System | Christmas Capsules |
| Active Codes | UPD21, REINHARDTO, CHRISTMAS, REZERO_PART2 |
In this comprehensive guide, we’ll break down how to get the new Secret Units (like Reinhard and Subaru), how to counter the annoying “God Shield” mechanic, and the best strategies for the new event modes. Whether you’re a veteran player or just starting out, this guide will help you maximize your gameplay experience and dominate the new content.
Contents
Active Anime Guardians Update 21 Codes (June 2026)
Redeem these codes immediately before they expire to get free Gems, Trait Rerolls, and Christmas Tokens:
| Code | Reward | Status | Expiration |
|---|---|---|---|
| UPD21 | 1 Limit Breaker | ✅ Active | December 2024 |
| REINHARDTO | 10,000 Christmas Coins | ✅ Active | December 2024 |
| CHRISTMAS | 1,000 TraitReroll + 5 Christmas Capsule | ✅ Active | December 2024 |
| REZERO_PART2 | 500 SuperStatReroll + 500 StatReroll | ✅ Active | December 2024 |
| 3Route_Subaru | 500 Artifacts Trait Reroll | ✅ Active | December 2024 |
| NEW_WORLDLINE! | 1 Limit Breaker | ✅ Active | December 2024 |
| Satella_Evo | 10,000 Cursed Coins | ✅ Active | December 2024 |
| ReZeroP1 | 1,000 TraitReroll | ✅ Active | December 2024 |
| BUFF_GAROU_SLIDE | 1,000 TraitReroll | ✅ Active | December 2024 |
| DELAY_GUARDIANS_2025 | 2,000 TraitReroll + 10,000 Alien Coins | ✅ Active | December 2024 |
How to Redeem Codes in Anime Guardians?
- Open the game and reach level 5 or higher
- Click the “Codes” button (usually found in the main menu or settings)
- Enter the code exactly as shown above
- Claim your rewards immediately
- Check your inventory to verify the rewards have been added
Expired Codes Reference 2026
| Code | Reason for Expiration |
|---|---|
| YUGISNEAKS | Previous update |
| ValentineDay | Valentine’s Day event |
| Update6.5 | Outdated update |
| GoblinSneak | Limited-time event |
| RukiaGacha | Bleach event |
| Bankai | Anime event |
| QOL_UPD9 | Quality of life update |
How to Get the New Re:Zero Units?
Update 21 introduces 11 new units, focusing heavily on the Re:Zero cast. Most of these are locked behind the new Christmas Capsules and Event Shop.
Top Tier Units to Look For:
- Reinhard (Strongest Human): A Limited unit with an extremely low drop rate. He is the main prize of this event.
- Subaru (Secret): Comes in three forms: Greed, Pride, and Gluttony.
- Regulus (Alpha Leonis): Another powerful Secret unit.
- The Witches: Including Minerva, Typhon, and others.
Gacha Strategy:
Since these units are time-limited, you need to farm Event Currency efficiently. Avoid spending on standard banners for now. If you are struggling to pull Reinhard and want to speed up the process, you can use Robux to buy extra capsule spins, but we recommend grinding the “City of Shattered Forest” mode first to save money.
Farming Strategies:
- City of Shattered Forest: Best for farming Christmas Coins
- Infinite Mode: Higher difficulty but better rewards
- Daily Quests: Complete all daily quests for bonus rewards
- Event Missions: Focus on Christmas event missions for exclusive rewards
Understanding the God Shield Mechanic
The God Shield is one of the most challenging new mechanics introduced in Update 21. This shield protects enemies and makes them significantly harder to defeat.
What is God Shield?
The God Shield is a protective barrier that certain enemies in the new Re:Zero content possess. When activated, it reduces damage taken by 90% and requires specific strategies to break through.
How to Counter God Shield:
- Use Units with True Damage: Characters like Reinhard have abilities that can bypass the shield
- Coordinate Attacks: Focus fire on shielded enemies with multiple units
- Timing is Crucial: Wait for the shield to be at low health before unleashing your strongest abilities
- Status Effects: Some units can apply debuffs that weaken the shield
Best Units Against God Shield:
- Reinhard: His “Authority of Wrath” ability can break through shields
- Subaru (Greed): Has area damage that ignores partial shield protection
- Regulus: His “Alpha Leonis” attack deals massive true damage
- Witch Units: Special abilities that can dispel protective effects
Christmas Event Strategies
The Christmas Event is a limited-time mode that offers exclusive rewards and challenges.
Event Overview:
The Christmas Event features three unique lanes that then split into 2 different lanes with each enemy having the God Shield. This creates a challenging defense scenario that requires strategic unit placement.
AFK Macro Strategy:
For players who want to farm Christmas Coins efficiently without constant monitoring:
- Set up a strong defense with tanky units at the front
- Place damage dealers behind your tanks
- Use healing units to keep your team alive
- Activate auto-battle and let the game run
- Collect rewards periodically
Optimal Unit Compositions:
- Front Line: Reinhard, Tank units for protection
- Mid Line: Subaru (Greed), Regulus for damage
- Back Line: Witch units for support and debuffs
- Healers: Support units to keep your team alive
Advanced Strategies for Update 21
Team Building Tips:
- Balance Your Team: Don’t focus on one type of unit. Mix tanks, damage dealers, and supports.
- Synergy is Key: Some units work better together than others.
- Upgrade Wisely: Focus on upgrading your most used units first.
- Trait Management: Use Trait Rerolls strategically to maximize your unit’s potential.
Resource Management:
- Save Christmas Coins for the best units
- Don’t waste Trait Rerolls on low-tier units
- Prioritize Limited units like Reinhard
- Complete daily quests for bonus resources
Common Mistakes to Avoid:
- Spending too early: Wait until you understand the new mechanics
- Ignoring the event shop: It offers exclusive rewards
- Using standard banners: Focus on Christmas Capsules
- Forgetting to redeem codes: They provide valuable resources
Community Resources
Official Channels:
- Discord Server: Join the official Anime Guardians Discord for real-time discussions, strategies, and updates
- Reddit Community: r/AnimeGuardians for player experiences and tips
- Fandom Wiki: Comprehensive database of units, strategies, and information
- Developer Social Media: Follow for official announcements and updates
Why Join the Community:
- Get the latest codes and strategies
- Connect with other players
- Share your experiences and learn from others
- Participate in community events and giveaways
Frequently Asked Questions
How do I get Reinhard in Anime Guardians?
Reinhard is a Limited unit available through Christmas Capsules. You can increase your chances by:
- Farming Christmas Coins in the City of Shattered Forest
- Using the REINHARDTO code for extra coins
- Spending Robux for additional capsule spins (if necessary)
- Participating in event missions
What is the best strategy for the God Shield?
The best strategy involves:
- Using units with True Damage abilities
- Coordinating attacks on shielded enemies
- Timing your strongest abilities
- Applying debuffs that weaken the shield
How many Christmas Coins do I need for Reinhard?
Reinhard typically requires around 50,000-100,000 Christmas Coins, depending on your luck. Using the REINHARDTO code gives you 10,000 extra coins to help.
Can I still get Re:Zero units after the event?
Limited units like Reinhard may not be available after the event ends. Regular Re:Zero units might become available through standard banners later.
What happens if I miss the Christmas Event?
Some rewards may be lost, but you can still obtain regular Re:Zero units through standard gameplay. Check the official announcements for future availability.
How do I fix lag during high-wave runs?
- Play on a device with higher RAM
- Lower graphics settings
- Close other apps running in the background
- Use units that don’t cause excessive visual effects
Final Tips for Update 21 Success
- Redeem all codes immediately to maximize your resources
- Focus on farming Christmas Coins for the best units
- Learn the God Shield mechanics before attempting difficult content
- Join the community for the latest strategies and tips
- Save your resources for the most valuable units
- Experiment with different team compositions to find what works best for you
- Complete daily quests for bonus rewards
- Check back regularly for new codes and updates
Update 21 brings exciting new content to Anime Guardians, and with the right strategies, you can dominate the new Re:Zero content and Christmas Event. Whether you’re chasing the powerful Reinhard or tackling the challenging God Shield mechanic, this guide has provided you with everything you need to succeed.
Remember to bookmark this page and check back regularly for updates, as new codes and strategies may be added as the event progresses. Happy gaming!
