Dingus Staff

Whenever a creature dies, Dingus Staff deals 2 damage to that creature's controller.

Reap

Return up to X target cards from your graveyard to your hand, where X is the number of black permanents target opponent controls as you cast this spell.

Hansk, Slayer Zealot

At the beginning of your upkeep, target opponent creates three Walker tokens. (They're 2/2 black Zombie creatures.)
{T}: Hansk, Slayer Zealot deals 2 damage to target creature.
Whenever a Zombie an opponent controls dies, draw a card.

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Aether Flash

Whenever a creature enters, Aether Flash deals 2 damage to it.