Toothed Rose

Forage (You can exile lands from your graveyard
while casting this spell; each one pays for {1} or one
mana of that land's color. Lands exiled this way have
"{1}: Return this land to your graveyard" until they
leave the exile.)
Deathtouch, Defender
The Swarm is necessary for Ravnica's survival, but
that doesn't make it welcoming at all.