Obelisk the Tormentor

Indestructible, Shroud, Trample, Reach
This Spell can not be countered.
When Obelisk is summoned, sacrifice 3 creatures
you control.
{t}{u/b}{u/b}: Sacrifice 2 creatures:
Choose a Player. Destroy every creature target
Player controls. If this ability was successfully activated, skip your combat phase of this turn.
This ability can only be activated in your first
main phase of the turn.