Edge of Insanity

Equipped creature has Insanity 3(At the beginning
of your upkeep, flip a coin. If you win the flip, put three
+1/+1 counters on this creature. If you lose the flip,
deal damage 3 to it's controller and itself.)
Whenever equipped creature deals combat damage
to a player, that player discards that many cards.
Equip- Discard a card