After Darkness may be used once by a player to eliminate any level 50/50 weapon at any time after sunset or before sunrise. May be used at any time (during the game)! Players are encouraged to check official sunset and sunrise times for the location in which they are playing.
If After Darkness is used for a Psi card play (Non-Matching Colors), then a player may use the card immediately or save the card directly from his five-card hand.