Never-Ending Music, LAYER (BD/W73-E103 PR) [BanG Dream! Vol.2]

[AUTO] When this card is placed on the stage from your hand, if your opponent has 1 or fewer characters on his or her center stage, choose 1 cost 0 or lower character in your opponent's center stage, and put it at the bottom of his or her deck. [AUTO] When this card attacks, choose 1 of your other "Music" characters, and that character gets +X power until end of turn. X is equal to the number of other "Music" characters you have ×500.