Jisei's Nightmare

Enchant creature
When Jisei's Nightmare enters the battlefield, if
enchanted creature is tapped, gain control of it.
Enchanted creature has "Whenever this creature
deals combat damage to a player, you and that
player each discard a card" and "This creature
attacks a random opponent each combat if able."

"No...please...go away...this isn't real...make it stop!"