Want to evolve Eizan → Eizan (Aura) and keep seeing “Prison Chair” in your inventory questions? This guide walks you through everything step-by-step: what the Prison Chair is, how to trigger the quest, exactly what you must sacrifice, how to prepare those sacrificial units fast, and final tips so you don’t waste gems or hours.
TL;DR (quick checklist)
- Summon Eizan (Aizen) from the Special/Gem banner → you’ll unlock the Locked Prison Chair quest.
- To complete it, you must sacrifice three fully-evolved Bleach / Update 4.0 (Almighty Invasion) units to the Locked Prison Chair. Doing so yields the Prison Chair evolution item.
- After you get the Prison Chair, collect the required essences/gold and use them in the Evolve menu to evolve Eizan into Eizan (Aura).
What is the Prison Chair and why does it matter
The Prison Chair is a Mythic evolution item specifically used to evolve Eizan (Aizen) into his secret form, Eizan (Aura). You don’t craft or buy this item — it’s granted by a questline tied to obtaining the unit and sacrificing three specific evolved units. In short: get Aizen → finish the Locked Prison Chair quest by sacrificing 3 evolved Bleach units → receive Prison Chair → evolve Aizen.
Step 1 — Obtain Eizan (Aizen)
- Summon on the Special/Gem banner. The Locked Prison Chair quest becomes available once you obtain the Mythic Eizan from the Gem/Special banner. Keep an eye on special banners that include Bleach/Update 4.0 units.
Notes
- This is a gem-banner unit → expect low pull rates. Consider saving gems for a banner where the unit and/or pity mechanics are favorable.
- If you don’t have Eizan, you can’t start the Locked Prison Chair quest at all — it’s unit-gated.
Step 2 — Open the Locked Prison Chair quest & read requirements
- After obtaining Eizan, open your Inventory → Quest / Locked Prison Chair entry. The quest will show the exact requirement: sacrifice 3 evolved Update 4.0 / Bleach units (three fully evolved Bleach units from the relevant update). Completing it gives you the Prison Chair.
Step 3 — Choose which units to sacrifice (best practice)
You need three fully-evolved Bleach (Almighty Invasion) units. That means you must:
- Own the Bleach units you plan to sacrifice.
- Evolve each of those three units (they must be evolved to count).
Community suggestions for “easy” sacrificial targets typically select units that are plentiful or easy to obtain/evolve (e.g., event shop units, free/low-rarity Bleach units, or ones you don’t mind losing).
My recommendation
- Pick units you already have duplicates of or units you don’t plan to use on teams.
- Prefer Bleach units for which evolution materials and essences are readily farmable, that won’t significantly dent your resource pool.
Step 4 — How to evolve the three sacrificial units (deep walkthrough)
Evolving any unit in Anime Vanguards generally requires:
- Essence stones (Green, Blue, Yellow, Purple, Rainbow, depending on unit),
- Gold,
- Unit EXP / unlocking requirements (some evolutions require takedowns, specific quest clears, or event items),
- Visiting the Evolve area in-game and using the Evolve menu.
Here’s how to efficiently prepare three evolved units:
A — Gather essences & materials fast
- Legend stages, boss shops, challenges, and events are your main sources for essence stones. Use the Legend Stages that drop the most Green/Legendary essences for crafting.
- Convert extra rainbow/legendary essence down into green if needed via dismantling/crafting options.
B — Get unit EXP quickly (so you can ascend/evolve)
- Fusing and doing “unit XP” stages (e.g., Martial Island Infinite, other map infinite modes) provides large amounts of unit XP. Secrets/Exclusives require more XP to fully level.
C — Farm takedowns and stat potential (if needed)
- Some players grind takedowns to max stat potential (5000 takedowns is listed as the cap for 100% potential on the wiki), which helps roll great stats before evolution. Still, takedowns are not the same as evolution requirements. If you want your sacrificial units to be “cheap” sacrifices, you can skip chasing perfect stats for them — they only need to be evolved.
- Best ways to farm takedowns include high-wave infinite runs and specific maps — community videos show the fastest takedown routes. If you’re in a hurry, follow a takedown guide/video to expedite the process.
D — Practical evolution sequence
- Choose a Bleach unit you can obtain (summon/shop/legend drops).
- Level it via fusing and unit XP stages until it meets its evolution level.
- Gather the unit’s specific essence/quest items (Legend stages, shops, event drops).
- Go to the Evolve area and evolve the unit.
- Repeat for three units.
Important: If a Bleach unit has any special evolution quest (drops, boss clears), do those quest steps first — the evolutions for Update 4.0 Bleach units are documented per-unit.
Step 5 — Sacrifice the evolved units to the Locked Prison Chair
- Open Inventory → Locked Prison Chair (quest item).
- Choose Use → you’ll see eligible units. Select the three evolved Bleach units you prepared. Confirm the sacrifice.
- Upon completion, you will receive the Prison Chair evolution item in your Inventory.
WARNING: Sacrificing is destructive — the sacrificed units lose most of their stats/traits and are consumed in the process (confirm what stats/levels are kept/lost on the stat transfer rules). Make sure you don’t accidentally sacrifice units you later regret.
Step 6 — Use the Prison Chair to evolve Eizan
- With Prison Chair in Inventory, go to the Evolve menu, select Eizan, and supply the Prison Chair plus the other evolution costs (essences/gold/rainbow essences listed for the evolve). The in-game evolve panel shows the exact requirements for your current update. Typical example requirements (may vary by update): Prison Chair + 30 Green Essence, 12 Blue, 12 Yellow, 15 Purple, 2 Rainbow — always confirm in-game.
Speed & resource optimization tips (pro-level)
- Don’t over-invest in sacrificial units’ stats. You only need them evolved: skip chasing Z+ stats on those units if you only intend to sacrifice them. Save essence & takedown grind for units you’ll actually use.
- Farm essence efficiently: run Legend stages & Boss Rush. Use boss/event shops to buy missing essences.
- If you pulled duplicates, evolve duplicates to use as sacrifice targets — duplicates are ideal.
- Watch community takedown guides if you must run takedowns for stat potential — creators show the best maps and playstyles for fast kills.
- Gold plan: evolve and stat transfers are gold-heavy. Use Infinite / worldlines & sell unwanted units if necessary for quick gold.
Common problems & troubleshooting
- “The Locked Prison Chair doesn’t show in my inventory.”
- You don’t yet own Eizan — the quest only appears after obtaining the unit. Confirm you pulled the Mythic from the gem banner.
- “My units aren’t showing as eligible for sacrifice.”
- They must be fully evolved and of the correct set (Bleach / Update 4.0 / Almighty Invasion units). Double-check that each unit’s evolution page lists it as eligible.
- “I evolved units, but the quest still won’t complete.”
- Make sure you evolved three Bleach units (not just leveled them). If any evolution had special quest steps, ensure those are done. Check the quest details in the Locked Prison Chair entry.
FAQ (quick answers)
- Can I get the Prison Chair without pulling Eizan? No, the Locked Prison Chair quest unlocks only after obtaining Eizan.
- Do sacrificed units keep anything? Sacrificed units lose stats/traits transferred (see stat transfer rules), so assume they’re essentially consumed.
- Where do I see the exact essence counts for evolving? Open the Evolve panel for Eizan — the in-game Evolve menu shows precise requirements for your current update.
Final checklist before you start (copy/paste)
- I have Eizan (pulled from the Gem/Special banner).
- I opened Inventory → Locked Prison Chair and read the quest.
- I have identified 3 Bleach units I don’t mind sacrificing (duplicates or low-value).
- I have the essence/gold/XP routes planned to evolve those three units.
- I will confirm the evolve requirements in-game before using the Prison Chair (essence counts can change by update).
Want visual step-by-step or a fast route to takedowns?
Several short community videos walk through evolving Aizen and the fastest takedown farming routes — they’re handy if you prefer watch-and-follow. Search for walkthrough videos on YouTube for map guides and live demonstrations.