Widnory, the Blood Binder

Whenever a creature you control dies that does not have a blood counter on it put a blood counter on Widnory, the Blood Binder.
Whenever another creature enters the battlefield under your control you may move a blood counter from Widnory, the Blood Binder onto that creature. Each creature you control that has a blood counter on it has, "When this creature dies if it died from combat damage you gain life equal to that creature's toughness."