Life Orb

Held: Holder’s moves inflict 30% extra damage, but cost 10% max HP.

Held: Damage from the holder’s moves is increased by 30%. On each turn the holder uses a damage-inflicting move, it takes 10% its max HP in damage.

An item to be held by a Pokémon. It boosts the power of moves, but at the cost of some HP on each hit.