Q: If performing the Shift ability on the Unstable side of a key would not affect each investigator or each enemy in play, can I still shift the key? A: To perform a Shift ability on a key, you must resolve as much of that ability as possible, and if that ability changed the game state at all, you are considered to have successfully shifted that key. For example, to shift The Last Blossom from its Unstable side, you must heal at least 1 damage from an enemy in play (though you must heal 1 damage from as many enemies as possible). Similarly, in order to shift The Bale Engine from its Unstable side, at minimum 1 investigator needs to discard 1 resource (but each investigator must discard as many resources as possible, to a max of 3). (Rules Q&A, August 2023)