Wikia

""Deletrius!" Mr. Diggory shouted, and the smoky skull vanished in a wisp of smoke."

—Description^[src]

Deletrius is a spell used to erase the "shadow" of the last spell performed by a wand.

Practicioners

Amos Diggory used this spell to remove the shadow of the Dark Mark after it was conjured from Harry Potter's wand using Prior Incantato.

Latin verb delere meaning to destroy, from which the English word "delete" is derived, meaning to remove.