Doom Shroom

As an additional cost to this spell, you may sacrifice a non-basic land or sacrifice two basic lands.
Destroy all non-plant, non-saproling creatures.
Nocturnal (White permanents have "{t}: As long as this permanent remains tapped, spells with Nocturnal don't resolve but remain on the stack)
"You're lucky I'm on your side," says Doom-shroom. "I could destroy everything you hold dear. It wouldn't be hard."