Kazark, Broken

As an additional cost to cast this spell,
sacrifice X permanents and/or exile X cards
from your hand and/or graveyard.
Hexproof, Annihilator X (Whenever this creature
attacks, defending player sacrifices X permanents.)
At the beginning of each opponent's upkeep,
that player exiles three cards from their
graveyard, then loses life equal to the number
of cards exiled this way.