Boss Rush Guide

The format

Wave N spawns N assembled bosses in a staggered column with a thinned escort. Rewards pay PER BOSS DEFEATED, so a deep failed run still pays well. Stamina gates attempts, making each run a deliberate raid rather than a grind loop.

The gauntlet has a wall. Bosses are sized to your Power, climb steadily to wave 10 and then grow ×1.25 per wave with no cap — and the column does not wait: 28 seconds after a wave’s last boss arrives, the next column marches in on top of whatever is still standing. A run is minutes of dense decisions, not half an hour of watching.

Records restarted with the wall: a best single run set before it is kept as your Pre-wall Record, and the Boss Rush leaderboard started fresh, so new records pay Ichor again.

What works

Sustained single-target damage with armor handling; disruption to keep the column from arriving as one fist; a guard hero when your line is strong, a dive hero when it needs a closer. Splash is a luxury here — bodies are few and fat.

Stamina economics

Because attempts are gated, Boss Rush rewards preparation over repetition: a five-minute Lab session before a run (stars on your single-target core, an armor-handling gene leveled, hero equipment aligned) is worth more than a second attempt after a sloppy first. The per-boss payout also means the correct exit is often voluntary — when wave N+1 would clearly end you, banking the completed kills beats donating the stamina to pride.