Barrier Cliffs

As an additional cost to cast Barrier Cliffs, pay {1}
Barrier Cliffs enters the battlefield tapped
{t}:Gain {c}{c}
Attacking creatures opponents control get -3/-2
"While their climb exhausts them, drop rocks on their
head. When they get to the top, push them back over
the edge. Do not let them gain foothold on our ground."
-Alpha Chaemar