Mirkwood Purifier

Delve (Each card you exile from your graveyard
while casting this spell pays for {1}.)
When Mirkwood Purifier enters the battlefield,
exile any number of cards from your opponents'
graveyards. You gain 1 life for each creature card
exiled this way. Srcy 1 for each noncreature,
nonland card exiled from their graveyard this
way. (To Scry 1, look at the top card of your library.
You may put that card on the bottom of your library.)