Vastion, The Dreadmarked

Double strike, lifelink, deathtouch
Players with dread or curse counters can't block wraith, specter, and shade creatures.
Whenever you gain life for the first time each
turn and whenever you lose life for the first time
each turn, each player gets a curse counter and
you put a +1/+1 counter on this creature. (Spells
you cast cost 1 more life to cast for each curse counter
you have. Whenever you gain any life, remove all
curse counter you have.)