After Concert Party Echika (SHS/W98-E093 U) Saekano the Movie: Finale Card details

[CONT] If you have 4 or more "Music" characters, this card gets -1 level while in your hand.
[AUTO] When this card is placed on the stage from your hand, this card gets +4500 power and the following ability until the end of your opponent's next turn. "[CONT] During this card's battle, all players cannot play "Backup" from their hands."
[AUTO] [Put 1 card from your hand into your waiting room] When this card is placed on the stage from your hand, you may pay the cost. If you do, choose 1 "icy tail, Michiru" in your waiting room, and return it to your hand.