Continuing Rainfall, Sakura

【AUTO】 When this card is placed on the stage from your hand, you may choose 1 "Duplicate Key to the Emiya Household" in your waiting room, and put it face up underneath this card as a marker.【AUTO】 [(1) Put 1 marker underneath this card into your waiting room] At the beginning of your opponent's attack phase, you may pay the cost. If you do, move this card to an open position of your back stage.【AUTO】 At the beginning of your draw phase, if you do not have another character in your center stage, this card gets +4000 power until end of turn.