Unmake

Harsh Sustenance

Harsh Sustenance deals X damage to any target and you gain X life, where X is the number of creatures you control.

Phyrexian Rager

When this creature enters, you draw a card and you lose 1 life.

Etched Familiar

When this creature dies, each opponent loses 2 life and you gain 2 life.

Snow-Covered Swamp

Myr Sire

When this creature dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

Tragic Slip

Target creature gets -1/-1 until end of turn.
Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Disenchant

Suture Priest

Whenever another creature you control enters, you may gain 1 life.
Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Vault Skirge

({B/P} can be paid with either {B} or 2 life.)
Flying
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Gixian Skullflayer

At the beginning of your upkeep, if there are three or more creature cards in your graveyard, put a +1/+1 counter on this creature.

Phyrexian Vivisector

Whenever a creature you control dies, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Ichor Shade

At the beginning of your end step, if an artifact or creature was put into a graveyard from the battlefield this turn, put a +1/+1 counter on this creature.

Phyrexian Gargantua

When this creature enters, you draw two cards and you lose 2 life.

Orzhov Guildgate

This land enters tapped.
{T}: Add {W} or {B}.

Cower in Fear

Creatures your opponents control get -1/-1 until end of turn.

Altar's Reap

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.