Erases the ghost images of spells revealed by Priori Incantato. Possibly can be used to remove other spell effects as well.
References from the canon
Amos Diggory used this to erase the ghost image of the Dark Mark he had caused to be emitted from Harry's wand (GF9).
Magic Type Magical effect Wandlore
Associated terms Prior Incantato
"deleterius" L. destroy, eradicate
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