Sic 'Em

Sic 'Em is an uncommon Necrobinder attack costing 1 Energy where Osty deals 5 damage and then Summons 2 whenever Osty hits the enemy again this turn. This creates a feedback loop where additional Osty attacks in the same turn both deal damage and grow Osty's HP through Summoning.

Sic 'Em chains powerfully with Rattle, which hits additional times based on prior Osty attacks this turn, generating multiple Summon triggers. Poke provides a cheap additional Osty hit, and Flatten becomes free after Osty's first attack, stacking more Summon triggers. Calcify boosts all of Osty's damage from these chained attacks.

In the Necrobinder Osty/Summon archetype, Sic 'Em is a key engine card that converts Osty attack chains into explosive HP growth. Against bosses like Ceremonial Beast where fights run long, the Summon generation from a Sic 'Em into Rattle into Flatten sequence can add 10+ HP to Osty in a single turn while dealing significant damage.