Boundary Charm

Multikicker {r/w}{w/u} (You may pay this card's kicker
cost multiple times as you cast it.)
Attacking creatures get -1/-1 until end of turn.
• If you kicked Boundary Charm once, attacking
or defending creatures get -2/-2 until end of turn.
• If you kicked Boundary Charm twice, attacking
or defending creatures get -3/-3 until end of turn
and creatures you control gain menace.