Tibalt, Maniacal Watchdog

+2: Deal 2 damage to a single target, discard a card. If the target was a colorless or black creature, deal 6 damage to that permanent instead.
-1: Deal damage divided among any number of targets equal to the number of cards in any opponents hand.
-10: Each player switches their library with their graveyard, put 5 1/1 red devil creatures on the battlefield under your control.