The Maximum Bio-Android World Raid is the large group encounter tied to Cell in Universal Tower Defense X. It pits up to 12 players against a boss built around elemental shield mechanics, separate objectives, and multiple battle phases. Clearing it rewards the Maximum Bio Android unit directly, and it is also the only place to farm the Maximum Symbol and Maximum Chamber needed to push Bio-Android (Imperfect) all the way to Perfect Maximum Bio-Android.
Quick answer: Bring a 12-player squad that covers several elements rather than one all-DPS team, break the boss’s elemental shields, survive each phase, and complete the raid to roll for the Maximum Bio Android unit plus the Maximum Symbol and Maximum Chamber. Both materials sit behind a pity meter, so repeated clears guarantee them.
What the Maximum Bio-Android World Raid drops
The raid feeds two goals at once. You can earn the Maximum Bio Android unit as a reward, and you collect the evolution materials that turn Bio-Android (Imperfect) into the Boundless-rarity Perfect Maximum Bio-Android, also known as Cell Max.
| Reward | Use |
|---|---|
| Maximum Bio Android (unit) | Roster unit earned by clearing the raid |
| Maximum Symbol | Evolution material for Cell Max (7 required), pity-backed |
| Maximum Chamber | Evolution material for Cell Max (3 required), pity-backed |
Because the Maximum Symbol and Maximum Chamber both carry a pity meter, you will receive each one as a guaranteed drop after a set number of raid completions even if earlier runs do not award them.
Raid requirements and team setup
This is cooperative content for up to 12 players. The defining mechanic is the elemental shield system on the boss, which means raw damage alone will stall. The fight rewards teams that can hit the boss with several different elements to strip those shields quickly.
- Group up to 12 players for the encounter.
- Bring units across multiple elements instead of stacking only your highest-damage carries.
- Expect special objectives and multiple phases rather than a single damage check.
Note: A balanced roster matters more here than peak single-target DPS. If your team can only cover one element, the shield phases will slow you down and put the clear at risk.
How to clear the raid
How you know the run worked
A successful raid completion gives you the chance to receive the Maximum Bio Android unit and advances your material counters. When the pity meter fills, the Maximum Symbol or Maximum Chamber arrives as a guaranteed reward, so you can plan exactly how many clears stand between you and your Cell Max evolution materials.
Turning raid materials into Cell Max
The Maximum Symbol and Maximum Chamber feed directly into the final evolution. To turn Bio-Android (Imperfect) into Perfect Maximum Bio-Android, you need the full material set listed below, combined with the Maximum Bio-Tail and Boundless Orb that come from the Blanco Beast Tear, which rotates every three hours on a server.
| Material | Amount | Source |
|---|---|---|
| Universal Fragment | 5 | General farming |
| Phantom Fragment | 10 | General farming |
| Sky Fragment | 15 | General farming |
| Maximum Symbol | 7 | Bio-Android World Raid (pity) |
| Maximum Chamber | 3 | Bio-Android World Raid (pity) |
| Maximum Bio-Tail | 1 | Blanco Beast Tear |
| Boundless Orb | 1 | Blanco Beast Tear |
| Gold | 50,000 | General farming |
Bring the unit and items to the Evolutions NPC, select Bio-Android (Imperfect) in the Evolve menu, and confirm the evolution once every material is in your inventory. The unit’s rarity changes to Boundless on completion, signaling that Perfect Maximum Bio-Android is now in your roster.
If you are still chasing the base unit, remember that the raid path and the portal path overlap. Bio-Android (Imperfect) comes from Portals opened with Perfect Arena Keys, while the World Raid supplies the Maximum Symbol and Maximum Chamber, so running both in parallel is the most efficient route to a finished Cell Max.
