======Mobiliarbus======
=====Spell Information=====
  * **Incantation:** [[Mobiliarbus]]
  * **Pronunciation:** //moh-bil-ee-AR-bus//
  * **Wand Movement:** Unknown. [[Hermione Granger]] performed it with a "jerk of her [[wand]]".
  * **Light:** None described.
  * **Effect:** Levitates and moves a tree or large plant.
  * **Type:** [[Charm]]
=====History and Known Uses=====
The [[Mobiliarbus]] charm is used on only one occasion in the entire series, during [[Harry Potter]]'s third year at [[Hogwarts]]. In December 1993, [[Harry Potter]], [[Ron Weasley]], and [[Hermione Granger]] were in [[The Three Broomsticks]] pub in [[Hogsmeade]]. Harry, concealed under his [[Invisibility Cloak]], was eavesdropping on a conversation between Minister for Magic [[Cornelius Fudge]], [[Professor McGonagall]], [[Professor Flitwick]], and [[Madam Rosmerta]].
To provide Harry with better cover, Hermione non-verbally cast the [[Mobiliarbus]] charm on a small, potted Christmas tree, causing it to float through the air and land on their table, effectively shielding Harry from view. The charm worked silently and precisely, demonstrating Hermione's growing proficiency with advanced and subtle [[magic]]. This allowed Harry to overhear the crucial, and at the time devastating, revelation that [[Sirius Black]] was his godfather and was believed to have betrayed his parents, [[James Potter]] and [[Lily Potter]], to [[Lord Voldemort]].
=====Learning and Counter-Spells=====
The difficulty of learning this [[charm]] is not explicitly stated. However, the fact that a third-year student, albeit a highly gifted one like [[Hermione Granger]], could cast it non-verbally suggests it is likely not of an advanced difficulty level. It requires concentration and precise control, similar to other levitation charms.
No specific counter-spell or method to stop [[Mobiliarbus]] is mentioned in the novels. It is probable that general-purpose counter-charms or simply overpowering the caster's will would be effective.
=====Etymology=====
The incantation is a compound of two Latin words:
  * **//Mobilis//**, meaning "movable," "mobile," or "easy to be moved."
  * **//Arbor//**, meaning "tree."
When combined, //Mobiliarbus// literally translates to "move the tree," accurately reflecting the spell's function. This naming convention is consistent with the related charm, [[Mobilicorpus]], which is used to move a body (//corpus//).
=====Behind the Scenes=====
  * This spell's only appearance is in //Harry Potter and the Prisoner of Azkaban//.
  * In the film adaptation of //Harry Potter and the Prisoner of Azkaban//, Hermione is shown whispering the incantation aloud when she moves the Christmas tree, whereas in the novel, she performs the spell non-verbally. (film)