He stood by the window looking sadly into infinity. Only noise in the room was his breath and low rustle of wind coming from open window. "Heartbreak sonata." Echoed in the room pronounced by soft male voice and blood bursted from his chest and back and he collapsed death as stone sad eerie sonata playing in the air like dark magic fullfilling the room.
He sacrificed his life for person he held most dear, but never got response for his feelings. He did this suicidal magic hoping the boy to get rid of his arrogance and nymph-like effect on other people.

He had dreamed numerous times of just holdin this incredibly beautiful boy and planting light kiss on his cheek, but he never dared to do that fearing that he'd scare him.
He had already confessed his feelings with no response from the boy and that made him realise he stood no change of getting the boy to like him, so he wanted purish his deceitful nature and help other people who might have to suffer it and get their hearts broken.

That was the spell.
Heartbreak sonata,
suicidal purification spell castable only by those whose heart has been broken so many times that it's uncapable to feel anymore sadness, cried so many times that no tears would come.