Bloodstar Limb

Whenever Bloodstar Limb enters the battlefield or an equipped creature you control deals combat damage to a player, put a Limb counter on Bloodstar Limb.

At the beginning of your end step, if there are 5 or more Limb counters on Bloodstar Limb, you may heal all shells you control by one, then draw a card.
If the total health healed this way is 2 or more, you may draw two cards instead.