Defender When Barrier of Bones enters the battlefield, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

{T}, Sacrifice Liliana's Steward: Target opponent discards a card. Activate only as a sorcery.

Undergrowth — When Lotleth Giant enters the battlefield, it deals 1 damage to target opponent for each creature card in your graveyard.

Deathtouch When Mire Triton enters the battlefield, mill two cards and you gain 2 life.

When Rotting Rats enters the battlefield, each player discards a card. Unearth {1}{B} ({1}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

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.)

Troll of Khazad-dûm can't be blocked except by three or more creatures. Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

Add {B}{B}{B}.

Return target creature card from your graveyard to the battlefield. Flashback—Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Sacrifice Blood Pet: Add {B}.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Flying Discard Faerie Macabre: Exile up to two target cards from graveyards.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.