Power Word Kill

Destroy target non-Angel, non-Demon, non-Devil, non-Dragon creature.

Crawling Barrens

{T}: Add {C}.
{4}: Put two +1/+1 counters on this land. Then you may have it become a 0/0 Elemental creature until end of turn. It's still a land.

Heartless Act

Choose one —
• Destroy target creature with no counters on it.
• Remove up to three counters from target creature.

Victim of Night

Destroy target non-Vampire, non-Werewolf, non-Zombie creature.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Swamp

Cast Down

Doom Blade

Spawning Pool

Spawning Pool enters tapped.
{T}: Add {B}.
{1}{B}: Spawning Pool becomes a 1/1 black Skeleton creature with "{B}: Regenerate this creature" until end of turn. It's still a land. (If it regenerates, the next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Go for the Throat

Ultimate Price

Infernal Grasp

Destroy target creature. You lose 2 life.

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.