Whenever you gain life, target opponent loses that much life.

Sanguine Bond

Secret Lair Drop

"The witch smiled, savoring every stolen year. Every love the knight would never court, every meal he'd never taste, every honor he'd never win, was sweet as honey on her tongue."
—*Hexes of Dunbarrow*

Wilds of Eldraine: Enchanting Tales

"They tried to pierce your heart with a Morgul-knife which remains in the wound. If they had succeeded, you would have become like they are, only weaker and under their command."
—Gandalf

Tales of Middle-earth Commander

"Blood is constant. Every drop I drink, someone must bleed."
—Vradeen, vampire nocturnus