(That reminder text really feels wonky to read for some reason.) Rooms, on the other hand, take a few key elements of double-faced cards, and then sprinkle them on newer variants of split card types
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Valiant Whenever this creature becomes the target of a spell or ability you control for the first time each turn, exile the top card of your library
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Card (Caesar Clown) FOIL NNO DON
Any abilities that triggered during this process are then put on the stack, starting by those controlled by the active player in an order of that player's choice, then continuing with each other player's abilities in turn order