======Arcus======
=====Spell Information=====
  * **Incantation:** //Arcus// (Often cast non-verbally)
  * **Pronunciation:** AR-kuss
  * **Wand Movement:** A circular, stirring motion with the wand. (//Fantastic Beasts: The Crimes of Grindelwald//)
  * **Light:** A trail of golden, glowing light.
  * **Effect:** A tracking [[spell]] that reveals the recent magical history or past events in a specific location. It creates ghostly, golden apparitions of the people and actions that occurred.
  * **Type:** [[Charm]]
=====History and Known Uses=====
This spell's only known use occurs in 1927. While investigating the [[Lestrange Mausoleum]] in [[Paris]] with [[Newt Scamander]] and [[Tina Goldstein]], [[Leta Lestrange]] cast this spell. She wanted to determine if [[Credence Barebone]] had visited the tomb and found the [[Lestrange]] family records. (//Fantastic Beasts: The Crimes of Grindelwald//)
The spell successfully conjured a golden, re-enactment of the past, showing [[Credence]] and the Maledictus ([[Nagini]]) finding the records, and the subsequent arrival and duel between [[Yusuf Kama]] and [[Jacob Kowalski]]. (//Fantastic Beasts: The Crimes of Grindelwald//)
=====Learning and Counter-Spells=====
There is no known information regarding the difficulty of learning this spell or any potential counter-spells or defensive measures against it.
=====Etymology=====
The incantation //Arcus// is Latin for "bow," "arch," or "arc." This likely refers to the arc of golden light the spell creates as it traces and reveals past events.
=====Behind the Scenes=====
The spell //Arcus// does not appear in the original seven *Harry Potter* novels. Its creation and only appearance to date is in the film *[[Fantastic Beasts: The Crimes of Grindelwald]]*.
The published screenplay for the film describes the effect as "a golden arc of light" that "paints a picture of what happened here." This spell serves as a narrative device to visually convey past events to the characters and audience, similar in function to viewing a memory in a [[Pensieve]].