Yinah, Gluttonous Consumer

Lifelink; delve (Each card you exile from your
graveyard while casting this spell pays for {1}.)
When Yinah, Gluttonous Consumer enters the
battlefield, gain 1 life for each nonland card you
exiled this turn.
Whenever you cast a spell from exile, each
opponent loses 2 life and you gain 2 life. If that
card would be put into your graveyard this turn,
each opponent mills two cards.