Xander, Knight of Shadows

Deathtouch, menace, first strike
Whenever Xander, Knight of Shadows attacks,
target defending player loses 5 life unless they
sacrifice a permanent, if a creature was sacrificed
this way, you gain 5 life, otherwise, draw a card
{4}{b}{b} destroy target permanent, it's controller
loses 5 life if it was a non land permanent
"If you believe you can prevail in this struggle,
you are wrong"