Dreth, Horror of the Abyss

Deathtouch
When Dreth, Horror of the Abyss enters the battlefield, if it was cast, lure each creature target
player controls. (A lured creature can't block this
turn and must attack you next turn if able.)
Whenever a creature dealt damage by Dreth this
turn dies, that creature's controller loses 3 life and
you gain 3 life.