Shvednok, the Unforgiving

Lifelink, flying, deathtouch, trample
When Shvednok, the Unforgiving enters the battlefield, create a blood token for each creature
on the battlefield.
Whenever you sacrifice a Blood Token, you gain
3 life.
Whenever a creature you control deals combat
damage to a player, create that many blood token.
Whenever a creature enters the battlefield under your control from anywhere other than your hand, create a 2/2 Vampire creature token with lifelink.