Katar

The Katar is a light fist weapon built around a dagger blade with an unusual handle, so your punches become stabs. It deals pure physical damage, scales with Strength and Dexterity, and has slightly better critical damage than most fist weapons.

It comes with Impaling Thrust and asks for very little in stats, which makes it an easy early pick for anyone who likes fast, close-range piercing attacks.