PRIORO INCANTATO

Calls forth the last spell(s) performed by a wand. The spell(s) has no power, rather it just displays the effect of the spell. Aurors created the Priori Incantato spell as a means of crime detection.

Prior - "preceding in time or order" 
Incantation - " ritual recitation of magical words or sounds"; "verbal charm or spell"
Incantato - From Latin - "incantatus"; the past participle of "Incantare" meaning to enchant.

Book: Goblet of Fire

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