Soul-siphon Wyrd

Choose two target creatures. Their controller sacrifices one of them. You lose 2 life.
Living Spell - {b}{p/b} (When you cast this spell,
you may pay its living spell cost; if you do, as it
resolves it enters the battlefield as a creature)
Lifelink, menace
When Soul-siphon Wyrd enters the battlefield,
if you lost 4 or more life this turn, draw a card.