Right Hand Hand

Right Hand Hand is an uncommon Necrobinder attack costing 0 Energy where Osty deals 4 damage, and whenever you play a card costing 2 or more Energy, Right Hand Hand returns to your Hand. This creates repeatable free Osty attacks that trigger as a bonus alongside your expensive plays.

Right Hand Hand loops back with Bury's 4-cost play, Eidolon's 2-cost Exhaust, and Legion of Bone's 2-cost Summon, providing free Osty damage alongside these powerful effects. Calcify amplifies the damage from each return, and Sic 'Em's Summon-on-hit triggers every time Right Hand Hand attacks.

In the Necrobinder Osty/Summon archetype, Right Hand Hand provides consistent free damage that rewards playing expensive cards. Against bosses where Energy efficiency matters like Doormaker and Test Subject #C10, getting free 4-damage Osty attacks alongside your main plays adds significant damage over a long fight. The card essentially has no opportunity cost once played.