How It Works
First Diamond summons her own arrow and places the special charm on the red heart. Then she runs her finger across the hearts on the handle, activating it and making the heart on top glow in blue. Then she holds onto the handle with one hand, spins around a few times and taps the arrow like a tambourine using her other hand that she is not using.
She is the only one who does not hold onto the small handle at the back of the heart. Instead, she holds onto the long white handle.
The name Diamond Shower refers to the attack as the ice is designed to look like diamonds and they come down in a shower!