The Necrobinder

A Spireborn Lich who commands Osty, a skeletal companion that absorbs all incoming damage. At 66 HP the most fragile character in the game, but compensates with Doom stacking (instant-kill threshold), Soul cycling draw engines, and the strongest overall damage ceiling in STS2.

PlaystyleLich with skeletal companion, Doom thresholds, and Soul cyclingStarting RelicBound Phylactery

Build Archetypes

Doom Stacking

7/10

Apply Doom stacks to enemies and deal chip damage until their HP falls below the Doom threshold — triggering instant death. High damage ceiling against bosses but slow and defensive in normal rooms — plays more like Silent than a heavy hitter. Doom is a flat threshold (not percentage-based), so against high-HP bosses you need to chip them down further before the kill triggers. A10 players report Doom build path is 'pretty weak as damage source' with the main payoff being the doom block card, but Doom cards have 'really good upgrade value' and benefit heavily from campfire upgrades.

Osty Tank

8/10

Osty, the Necrobinder's skeletal companion, absorbs all incoming damage as long as they remain alive. The Osty Tank archetype treats this mechanic as the primary survival strategy: invest in healing and buffing Osty to maintain the damage shield indefinitely, while Osty's attacks contribute free offense.

Soul Cycle

8/10

The bread and butter of Necrobinder, and the safest archetype because it provides consistent draw and cycling that supports every other strategy. Generate Souls as a resource via Capture Spirit and Seance, trigger Haunt and Devour Life for passive damage and Osty sustain, and cycle the entire deck repeatedly each turn. Creates a near-infinite draw engine that finds Scourge or Bodyguard precisely when needed. A10 players consistently rate Soul as the best Necrobinder archetype because of its safety — enough removes plus energy generation equals cycling through the entire deck every turn.