Gehrman, The First Hunter

Whenever you cast your first spell each turn,
each player mills X, where X is that spell's
converted mana cost.
Delirium — As long as there are four or more
card types among cards in your graveyard, each creature in your graveyard has escape. The
escape cost is equal to the card's mana cost plus
exile two other cards from your graveyard. (You
may cast cards from your graveyard for their escape
cost.)