HP Absorb is a Support Materia that restores the user's HP when the paired ability is used. The amount restored is 10% of the damage dealt, but if the ability heals the target, HP Absorb will hurt the character instead. Linking HP Absorb to an attack that does damage overflow to a target will kill the attacker. The Materia can be found in Wutai Village in the 'cat house' during Yuffie's quest there, or in the second section of the Northern Cave.