Aether Snap

Remove all counters from all permanents and exile all tokens.

Burden of Greed

Target player loses 1 life for each tapped artifact they control.

Chittering Rats

When this creature enters, target opponent puts a card from their hand on top of their library.

Hallow

Prevent all damage target spell would deal this turn. You gain life equal to the damage prevented this way.

Death Cloud

Each player loses X life, discards X cards, sacrifices X creatures of their choice, then sacrifices X lands of their choice.

Echoing Decay

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Emissary of Despair

Flying
Whenever this creature deals combat damage to a player, that player loses 1 life for each artifact they control.

Essence Drain

Essence Drain deals 3 damage to any target and you gain 3 life.

Greater Harvester

At the beginning of your upkeep, sacrifice a permanent.
Whenever this creature deals combat damage to a player, that player sacrifices two permanents of their choice.

Grimclaw Bats

Flying
{B}, Pay 1 life: This creature gets +1/+1 until end of turn.

Hunger of the Nim

Target creature gets +1/+0 until end of turn for each artifact you control.

Mephitic Ooze

This creature gets +1/+0 for each artifact you control.
Whenever this creature deals combat damage to a creature, destroy that creature. The creature can't be regenerated.

Murderous Spoils

Destroy target nonblack creature. It can't be regenerated. You gain control of all Equipment that were attached to it. (This effect lasts indefinitely.)

Nim Abomination

At the beginning of your end step, if this creature is untapped, you lose 3 life.

Leonin Battlemage

{T}: Target creature gets +1/+1 until end of turn.
Whenever you cast a spell, you may untap this creature.

Pulse of the Dross

Target player reveals three cards from their hand and you choose one of them. That player discards that card. Then if that player has more cards in hand than you, return Pulse of the Dross to its owner's hand.

Darksteel