You can activate 1 of these effects;

• Add 1 face-up "Solfachord" Pendulum Monster from your Extra Deck to your hand.

• Increase the Pendulum Scale of 1 "Solfachord" card in your Pendulum Zone by its Level this turn.

• If you control "Solfachord" Pendulum Monster Cards with at least 3 different even Pendulum Scales or at least 3 different odd Pendulum Scales, destroy 1 card your opponent controls.

You can only use each effect of "Solfachord Harmonia" once per turn.