Lilit, Portent Provocateur

Spectacle {2}{b}{r} (You may cast this spell for its
spectacle cost rather than its mana cost if an opponent
lost life this turn.)
Whenever Lilit, Portent Provocatuer enters the
battlefield or dies, goad each creature your
opponents control. If the spectacle cost was paid,
exile the top two cards of your library. You may
play both until the end of your next turn.
Whenever a goaded creature dies, each opponent
loses 1 life, and you gain 1 life.