Where Owls Know My Name

This card can also be used as black or green mana
{g}, {t}: Discard your hand, create a 2/2 tree token for each creature in your graveyard
{b}, {t}: put a -2/-2 counter on each creature target player has in their library, hand, graveyard, and on the battlefield
"Lost in eternity's grasp, withdrawing further from what we have known, this mentality that we've built, it's breaking down."
-Jake Dieffenbach