The Vienna Gambit (Opening)

If Vienna Gambit is in your opening hand,
you may begin the game with it on the Battlefield
All Pawns enter the Battlefield with two +1/+1 counters and Intimidate
You can only cast Pawns unless there are
no Pawns on the Battlefield
When a Pawn enter the Battlefield, Destroy all
non-Pawn Creatures you control
(Second Pawn must be Sacrificed)
You can only start with one Opening