Damnation

Destroy all creatures. They can't be regenerated.

Walk the Plank

Black Sun's Zenith

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

Malicious Affliction

Morbid — When you cast this spell, if a creature died this turn, you may copy Malicious Affliction and may choose a new target for the copy.
Destroy target nonblack creature.

River's Rebuke

Return all nonland permanents target player controls to their owner's hand.