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Summon
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Summon
Summon
Osty
.
If already summoned, raise his Max HP for this combat.
In the tooltips of
Devour Life
Sic 'Em
Summon Next Turn
Phylactery Unbound
Mentioned in
Glam on X-cost cards in Slay the Spire 2: what the replay spends
Necrobinder Doom in Slay the Spire 2: every card that applies or uses Doom
Touch of Orobas or Electric Shrymp in Slay the Spire 2?
Necrobinder guide: Osty, Summon, Souls and Doom in Slay the Spire 2
Slay the Spire 2 update, 18 June 2026: RNG rework, Steam Workshop, Bestiary
Slay the Spire 2 patch, 4 June 2026: Aeonglass and Juggernaut changes