Agonizing Syphon

Agonizing Syphon deals 3 damage to any target and you gain 3 life.

March of the Returned

Return up to two target creature cards from your graveyard to your hand.

Diregraf Ghoul enters the battlefield tapped.

At the beginning of your upkeep, you draw a card and you lose 1 life.

At the beginning of your upkeep, tap Sangrophage unless you pay 2 life.

Death's Shadow gets -X/-X, where X is your life total.

Target player draws two cards and loses 2 life.

Flying
If damage would be dealt to you, prevent that damage and mill twice that many cards.

Whenever another creature enters the battlefield, you lose 1 life.

When Slum Reaper enters the battlefield, each player sacrifices a creature.

When Hidden Horror enters the battlefield, sacrifice it unless you discard a creature card.