Sheoldred, the Apocalypse

Deathtouch
Whenever you draw a card, you gain 2 life.
Whenever an opponent draws a card, they lose 2 life.

Seizan, Perverter of Truth

At the beginning of each player's upkeep, that player loses 2 life and draws two cards.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Target player draws X cards and loses X life.