Primordial Mist
Enchantment
Exile a face-down permanent you control face up: You may play that card this turn. (You still pay its costs. Timing rules still apply.)
Legal in
Legacy, Vintage, Commander
Rulings (20)
Activating Primordial Mist's last ability doesn't trigger abilities that trigger "when [something] is turned face up."
2018-07-13
There are no cards in this set that would turn a face-down instant or sorcery card on the battlefield face up, but some older cards can try to do this. If something tries to turn a face-down instant or sorcery card on the battlefield face up, reveal that card to show all players it's an instant or sorcery card. The permanent remains on the battlefield face down. Abilities that trigger when a permanent turns face up won't trigger, because even though you revealed the card, it never turned face up.
2018-07-13
Turning a permanent face up or face down doesn't change whether that permanent is tapped or untapped.
2018-07-13
If a face-down permanent you control leaves the battlefield, you must reveal it. You must also reveal all face-down spells and permanents you control if you leave the game or if the game ends.
2018-07-13