Cthulu, Star Shaper

Flying, Trample
Whenever Cthulhu, is targeted by a spell
or ability, choose target opponent, they sacrifice
two creatures or Cthulhu gains hexproof
until end of turn.
{2}{u}{b}{r}: draw three cards, then you may
discard any number of cards, for each card
you discard, target opponent loses 3 life and
sacrifices a permanent.