unreal destruction.

when you play this card, target opponent can pay {4}.
Destroy All Creatures You get a madness counter
for each creature destroyed this way. if the
opponent paid the cost you take X damage where
X is half the madness counters you have.
the whole kingdom flew in the air like it was nothing,
and floated across the night sky lit by night, ignoring the
laws of gravity... all the survivors went mad