Valak

Hexproof, First Strike.
Valak comes into play with four rift tokens.
As long as Valak is incorporeal, they can't attack or block.
Valak gains +1 +1 for each minion with stats of 3/3 or under.
{t}{b}{b} Remove a rift token from Valak, when all rift tokens are removed, Valak isn't incorporeal.