The loop
Prepare outside the arena, survive Colosseum waves, beat bosses for better rewards, then spend the result on strength, gear, skills, and boons so the next waves last longer.
The November 9, 2026 listing states the survival length directly: squads of 4 or solo, revive allies, through 60 waves. A server holds 12 players, so more than one squad can share a server. How matchmaking fills those slots is not described.
During a run
- Fight the wave of monsters and undead.
- If a squadmate goes down, a standing ally can revive them. Solo play has nobody to revive. The downed state is confirmed; the exact revive prompt is not documented.
- After each round, follow the loading tip: Pick a boon after each round to shape your build. Boons are separate from skill-tree points and from armor you equip.
- Named arena bosses along this climb are the War Lion, Undead Brute, and Cerberus. Public material does not give their health, moves, or which wave number spawns them.
Hardcore waves are a different label
Do not assume wave 21 of a normal 60-wave run is automatically Hardcore. The experience page lists Hardcore on its own line: wave 21 turns the arena blood red, and wave 41 goes Insane. Read Hardcore, Trials, and the raid before you plan a push past wave 20.
No source ties a specific drop to a specific wave. Treat loot as something you equip whenever a chest opens, not as a reward pinned to one wave number.