False Cure

Until end of turn, whenever a player gains life, that player loses 2 life for each 1 life they gained.

Syphon Mind

Each other player discards a card. You draw a card for each card discarded this way.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Unspeakable Symbol

Pay 3 life: Put a +1/+1 counter on target creature.

Blood Celebrant

{B}, Pay 1 life: Add one mana of any color.

Chainer, Dementia Master

All Nightmares get +1/+1.
{B}{B}{B}, Pay 3 life: Put target creature card from a graveyard onto the battlefield under your control. That creature is black and is a Nightmare in addition to its other creature types.
When Chainer, Dementia Master leaves the battlefield, exile all Nightmares.

Necrologia

Cast this spell only during your end step.
As an additional cost to cast this spell, pay X life.
Draw X cards.

Sickening Dreams

As an additional cost to cast this spell, discard X cards.
Sickening Dreams deals X damage to each creature and each player.

Phyrexian Arena

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

Vindicate

Mischievous Poltergeist

Flying
Pay 1 life: Regenerate Mischievous Poltergeist.

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Skirge Familiar

Selenia, Dark Angel

Flying
Pay 2 life: Return Selenia, Dark Angel to its owner's hand.

Soul Warden

Whenever another creature enters, you gain 1 life.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.