Turning Trembles into Strength, Aya Maruyama (BD/W73-E006 R) [BanG Dream! Vol.2]

[AUTO] When this card is placed on the stage from your hand, you may put the top card of your clock into your waiting room. [AUTO] [Put 4 "Pastel*Palettes" characters from your hand into your waiting room] When this card attacks, you may pay the cost. If you do, this card gets +4000 power until end of turn, and deal X damage to your opponent. X is equal to the total number of colors of the cards put into your waiting room as payment for this effect's cost. (Damage may be canceled)