Leech

Each time you attack with a melee weapon, you leech 25% (rounded up) of attack damage as recovered hit points. You cannot exceed your total hp with this feat. Leeching occurs on every melee attack always. Leeched hp cannot be transferred to any other character. 

Ex. You successfully hit with 9 damage points, you then recover (2.25 hp rounded up) 3 hit points.