Obelisk the Tormentor

Shroud, split second, trample
As an additional cost to cast Obelisk the
Tormentor, sacrifice three creatures. When you
cast this card, it cannot be countered or negated.
Sacrifice two other creatures: Destroy all creatures
you don't control. They can't be regenerated. Skip
your battle phase on the turn you activated this ability. Activate this ability only any time you
could cast a sorcery.