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Revision as of 11:52, December 3, 2011

Priori Incantatem

Priori Incantatem between Lord Voldemort and Harry Potter in 1995.

Priori Incantatem is a magical phenomenon that can occur when two wands which share the same source for their cores are forced to compete in combat. It is sometimes referred to as the "reverse-spell effect". It can also be induced by analytical spells, like an extension of the Prior Incantato spell.


During a wand duel, a simultaneous spellcasting by both parties with twin wand cores will trigger an effect where both wands are linked through separate threads of spell energy. The two wand holders then compete in a battle of wills, in which the loser's wand is forced to display in ghostly form the spells which had been cast by said wand, in order of most recent to least recent. If any of those spells are Killing Curses, the victims will appear in ghost-like form, capable of holding a conversation with nearby living beings. When the spells come into contact they send out a seismic pulse which has enough force to knock onlookers from their feet. When the spells meet, they intertwine, making it difficult for either caster to break the connection. A spell-like residue falls from the core of the connection, possibly representing the wills of the casters and the energy of the incantations. A dome effect occurs during the connection, in order to keep any intruders from attacking either wizard or witch. The sound of the connection is similar to electrical arcs.


The effect is similar to the spell Prior Incantato, (but this spell does not need a wand connection) which causes the targeted wand to recall its last spells.

Known Instances

The only widely-known instance of Priori Incantatem came about in 1995, at the graveyard in Little Hangleton, when Harry Potter first duelled with the resurrected Lord Voldemort. The two wands in question both had a phoenix feather at their core from Fawkes, pet of Albus Dumbledore.

  • Priori Incantatem rarely ever happens when two opponents forcibly use their wands in battle. The reason it happened during the 1995 duel between Harry Potter and Lord Voldemort is due to the cores their wands shared; since the wands recognized each other as "brothers", they refused to destroy each other, and when spurred on, one forced the other to regurgitate its spells.

Behind the scenes

  • Voldemort's victims were supposed to come out in reverse order. Therefore, since James Potter was killed before Lily, he should have come second after Lily. The book identified James Potter being first to show up on the scene. This was a minor mistake in the series, which was corrected in later editions.
  • During the duel, Voldemort's wand emitted "echoing screams of pain", which may refer to the Cruciatus Curse he used earlier on both Harry and Wormtail (when punishing the latter for letting Barty Crouch Sr. escape).
Arthur weasley duel

Arthur Weasley and an unidentified Death Eater duelling, producing an effect similar to Priori Incantatem.


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