You can activate 1 of these effects. You can only use each of the following effects of "Doremichord Harmonia" once per turn.
● Add 1 face-up "Doremichord" Pendulum Monster from your Extra Deck to your hand.
● Increase the Pendulum Scale of 1 "Doremichord" card in your Pendulum Zone by its Level until the end of this turn.
● If you control 3 or more "Doremichord" Pendulum Monster Cards with different names that have odd Pendulum Scales, or even Pendulum Scales: Destroy 1 card your opponent controls.