Whenever a Goblin you control is put into a graveyard from the battlefield, you may put a +1/+1 counter on Knucklebone Witch. 1/1
Flying Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random. 2/2
Flying When Liliana’s Specter enters, each opponent discards a card. 2/1
Whenever you gain life, target opponent loses that much life. {3}{B}{B}: Creatures you control gain lifelink until end of turn. 1/3
Flying, protection from white When Malakir Bloodwitch enters, each opponent loses life equal to the number of Vampires you control. You gain life equal to the life lost this way. 4/4
Flying, trample At the beginning of your upkeep, sacrifice a creature other than Lord of the Pit. If you can't, Lord of the Pit deals 7 damage to you.
Arvinox, the Mind Flail isn’t a creature unless you control three or more permanents you don’t own. At the beginning of your end step, exile the bottom card of each opponent’s library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells. 9/9
Flying Whenever Stinkweed Imp deals combat damage to a creature, destroy that creature. Dredge 5 (If you would draw a card, you may mill five cards instead. If you do, return this card from your graveyard to your hand.) 1/2
Rats you control have menace. {1}{B}, {T}: Create a 1/1 black Rat creature token. {2}{B}{B}, {T}, Sacrifice three Rats: Gain control of target creature. 1/3
Other Zombies you control get +1/+1. 1B, T: All Zombies gain menace until end of turn.
+1: Mill three cards. If at least one Zombie card is milled this way, each opponent loses 2 life and you gain 2 life. −2: Target creature gets -X/-X until end of turn, where X is the number of Zombies you control. −3: You may cast Zombie spells from your graveyard this turn.
Buyback—Discard two cards. (You may discard two cards in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.) Search your library for a card, put that card into your hand, then shuffle.