We all know, that cards like Lurker, Graverobber and Rogue allow endless loops in tandem with Bonfire/Donate and King’s Court. The following idea is a way to make those loops impossible:
Instead of directly moving trashed cards to the trash pile, they are set aside and first moved to the trash at end of turn, after resolving all extra turns of Possession, Outpost and Mission. What do you think about this?