Prowler's Cap

The Prowler's Cap is an uncommon head armor in the Prowler's set that adds 25% critical hit chance to backstabs. Backstabs already deal bonus damage from hitting from behind — adding a 1-in-4 crit chance on top of that makes positioning-aware play significantly more rewarding. The other two Prowler's set pieces are the Prowler's Mask and Prowler's Vial; equipping all three upgrades backstabs to guaranteed critical hits, turning the positional mechanic into a near-automatic damage multiplier.

Even as a standalone piece, the 25% crit chance is worth taking on any cat that regularly attacks from behind. Combined with the Cat Paw's 25% refresh, you get a cat that sometimes attacks twice with a meaningful crit chance on each backstab swing.