Force of Oblivion

You may pay half your life, rounded up, and exile a black card from your hand rather than pay this spell's mana cost.
Exile target creature, planeswalker or spell.
"I was reborn in His divine power, and I rose to face
my attackers. Their bodies erupted as I tore their souls from their mortal vessels, staining my garment in the blackened blood of the deserving."
--Darklord Obsidath