| HP | 240 |
| Type | Boss |
| Act | Act 1b · Underdocks |
Almost every action adds 3 Steam Eruption stacks. At 0 HP it turns invulnerable and clears all debuffs, then self-destructs next turn for damage equal to its stacks — unless killed at 0 stacks (e.g. by a Doom execute). A pure DPS race.
Enemy values are checked against game v0.111— Early Access balance can shift between patches.
Every Act 1 enemy, elite and boss in Slay the Spire 2 Early Access (v0.111 beta): turn loops, HP checks, block thresholds and per-character counters for both Overgrowth and Underdocks variant pools.
Every status effect in Slay the Spire 2 Early Access v0.111 explained with exact numbers: the +50% Vulnerable and -25% Weak math, Poison and Doom stacking rules, Strength races, Block, Plating and Intangible defense, the status cards bosses shove into your deck, and which bosses clear or resist each debuff.
Every potion in Slay the Spire 2 v0.111 explained: exact effects, the best turn to drink each one, hold versus drink logic, Fairy in a Bottle insurance, and potion priorities for all five characters.
