Yeah, the "this stays in play" clause is separate from the "rest of the game" effect clause on Hireling and Champion. They stay in play for tracking reasons. And in Hireling's case, to prevent you from stacking the effect every shuffle.Edit: which means technically you can Throne a Hireling and then free up the Throne Room by trashing Hireling with Bonfire. Now I really want to play a game with KC, Hireling, and Bonfire, just to see how many cards I start my turn with by the end of the game. It's so fun to just mess around with silly concepts like that. I hope the new promo is on the unusual side. Not that there's not already plenty of messing around material in Dominion.