Slay the Spire 2 Monster
Osty
Osty is a normal encounter with 1 base HP. 1 moves are documented.
- Encounter
- Normal
- Base HP
- 1
- High Ascension HP
- Unknown
- Known moves
- 1
- Act
- Event / unknown
Moves and intents
| Move | Intent | Damage | Block |
|---|---|---|---|
| Nothing | Unknown | - | - |
Attack pattern
The current data does not expose a simple fixed pattern. Read intent each turn and preserve an emergency block or potion line for the highest documented hit.
Preparation notes
Use the move table as a damage threshold, not a script that replaces reading the fight. Ascension, multiplayer scaling, powers, and patch changes can alter the exact line. For boss-specific planning, continue to the boss guide hub.
Used in real decisions
Guides that mention Osty
Sacrifice in beta: when Osty's Max HP should become BlockCalculate beta Sacrifice's triple-Max-HP Block and compare it with keeping Osty alive, including an example and rebuilding checklist.Necrobinder Osty Doom A10 Control GuideA Necrobinder A10 guide for Osty summon timing, doom thresholds, control turns, hallway safety, and when to stop adding slow payoff cards.Necrobinder Doom Build Guide: Instant Kill Thresholds and Osty TacticsA practical Necrobinder Doom build guide for Slay the Spire 2 covering Doom mechanics, Osty summons, instant-kill thresholds, and how to bypass enemy defenses entirely.The Scythe in beta: when permanent damage is worth the tempoPlan The Scythe's permanent damage growth in the current beta without taking unnecessary hits to farm it. Includes upgrade arithmetic.Necrobinder v0.111 Guide: Shroud Block and Repeatable Time's UpShroud gains more Block and Time's Up no longer Exhausts in v0.111. Learn how to build a Doom plan that defends while scaling without becoming too slow.