Cedric is in his tower making potions with his raven, Wormwood. As he brews, he's humming a merry tune, thinking that he's alone in his tower as he speaks playfully and sinisterly to his bird

"Oh, Wormy! Just think of how easy it'll be for me to snatch that amulet once I'm done with this invisibility potion!"

He sounds giddy as he talks to the bird, flourishing his arms as he adds to the potion, brewing it with a fun flair and a skip in his step