Gravecrawler can't block. You may cast Gravecrawler from your graveyard as long as you control a Zombie.

You can't spend mana to cast this spell. Convoke, delve (Each creature you tap while casting this spell pays for {1} or one mana of that creature's color. Each card you exile from your graveyard pays for {1}.) You may cast Hogaak, Arisen Necropolis from your graveyard. Trample

Deathtouch Curse of the Walking Pox — Whenever you cast a spell from anywhere other than your hand, return Poxwalkers from your graveyard to the battlefield tapped.

Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.

Carrion Feeder can't block. Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Discard a card: Putrid Imp gains flying until end of turn. Threshold — As long as seven or more cards are in your graveyard, Putrid Imp gets +1/+1 and can't block.

When Stitcher's Supplier enters the battlefield or dies, mill three cards.

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

({T}: Add {B}.)

Spells and abilities your opponents control can't cause their controller to search their library. −1: Target player mills four cards. Then exile each opponent's graveyard.

As Pithing Needle enters the battlefield, choose a card name. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Deathtouch As Plague Engineer enters the battlefield, choose a creature type. Creatures of the chosen type your opponents control get -1/-1.

At the beginning of your upkeep, discard a card.

({B/P} can be paid with either {B} or 2 life.) Choose target card in a graveyard other than a basic land card. Search its owner's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Bloodghast can't block. Bloodghast has haste as long as an opponent has 10 or less life. Landfall — Whenever a land enters the battlefield under your control, you may return Bloodghast from your graveyard to the battlefield.

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.)