Keyword: Wither

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever Stigma Lasher deals damage to a player, that player can’t gain life for the rest of the game.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Noxious Hatchling enters with four -1/-1 counters on it.
Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever you cast a black spell, remove a -1/-1 counter from Noxious Hatchling.
Whenever you cast a green spell, remove a -1/-1 counter from Noxious Hatchling.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
: Duergar Cave-Guard gets +1/+0 until end of turn.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
, : Hateflayer deals damage equal to its power to any target. ( is the untap symbol.)

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Puncture Blast deals 3 damage to any target.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner’s control with a -1/-1 counter on it.)

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever Stigma Lasher deals damage to a player, that player can’t gain life for the rest of the game.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
: Twinblade Slasher gets +2/+2 until end of turn. Activate only once each turn.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may return that card to the battlefield under your control.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flying
Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever Needle Specter deals combat damage to a player, that player discards that many cards.

Haste
Wither (This deals damage to creatures in the form of -1/-1 counters.)