Gascon, Duke of Dogs

: Gascon enters the battlefield under the control of an opponent of your choice. Gascon's owner may activate his abilities during their turn.
+1: Until the beginning of your next upkeep, target opponent gains control of target creature you control and it gains indestructible.
-4: Gascon, Duke of Dogs deals 4 damage to you and 4 damage to target creature you control chosen at random.