Nightmare Hat

The Nightmare Hat is an uncommon head armor in the Leather set that unlocks a permanent bonus after 3 kills: the wearer gains 1 extra attack per turn. Three kills is an achievable threshold in most encounters, making this effectively a strong late-battle multiplier for any cat that fights consistently. The extra attack fires every turn after the condition is met, compounding in longer fights.

It pairs naturally with the Leather set's other armor pieces (Leather Cap, Choker, and Mask), which all grant Brace. A kill-focused melee cat wearing the full Leather set gets both the stabilization from Brace stacking and the extra attack payoff after cleaning up three enemies. Any weapon with on-hit effects becomes doubly valuable once the Nightmare Hat's bonus kicks in.