After reading that (very entertaining and mind braking and mind repairing) thread about Throne Room-BoM-Feast-Duration shenanigans, I wanted to make sure we're all thankful that this is not a real card yet:
Gang Of Crooks, $9, Action/Duration/Reserve
You may play an Action card from your hand twice. Trash it, then play this as if it were an Action card in the Supply costing $1 more than the trashed card that you choose. This is that card until it leaves play. At the start of your next turn, put this on your Tavern mat. | At the start of your turn, you may call this, to do this twice: Play this as if it were an Action card in the trash that you choose. This is that card until it leaves play.