Obelisk the Tormentor

Flying, Hexproof, Trample
This card can't be countered. As an additional
cost to cast this card, sacrifice 3 creatures you
control with total mana value {10} or more. If this
creature is not cast from your hand, it gains haste
and "sacrifice this creature at the end of this
turn". At the befining of your battle-phase, you
may sacrifice 2 creatures. If you do, exile each creature your opponent(s) control and Obelisk
cannot attack until your next turn.