Summoning Ghosts

There are several spells used for summoning ghosts. Although they differ in the manner and procedure of summoning, they all allow a spirit to manifest itself for a limited time. The rituals and spells also vary on the purposes of why a ghost is being summoned.

With a Talisman
A spell of this kind is considered to be black magic, similar to the spell used for binding reapers. Additionally, this spell not only summoned ghosts and spirits, it also allowed the caster to bind the ghosts to his will. As such, this spell is considered to be a form of necromancy. This spell was demonstrated by Walter Dixon to exact revenge on the hollywood executives that ruined his script.

Procedure
Like most spells, this required a chant. A talisman is also required to serve as a medium to accomplish the spell.

Incantation
The incantation is in Latin. The chant varies depending on the number of ghosts being summoned by the caster. Walter used a different incantation when he summoned only one ghost, and another one when he summoned all spirits bound to the area.

The incantation to summon one ghost or spirit is as follows, "contra obsecro hoc spiritum justa ad facientem voluntatum mayhem". The incantation to summon multiple spirits is as follows, "malis omnis ad me venite".

Talisman
The talisman has the appearance of a slanted cross that is enclosed by a circle. It must be held up when reciting any of the incantations.

The talisman is fragile and must be kept intact. Destroying the talisman would release the enslaved ghosts, thus allowing them to regain control of their will and turn against the caster of the spell.

Through a Séance
Unlike the other method, this spell functions more like a séance. The ghost being summoned is not being forced to attack targets, but simply to manifest itself, for the purposes of communication. There are different incantations used by hunters. Some, when performed with a psychic, required no incantation at all; it merely required repeating orders or commands for the being to manifest itself.

Incantations
Sam, while trying to summon the spirit of Father Thomas Gregory, used the following chant, "Amate spiritus obscure, te quaerimus, te oramus, nobiscum colloquere, aput nos circita". He used a different incantation when he tried to summon the brother of the ghost that haunted through the use of a ghost ship. His incantation invoked several names of beings. The names of the beings the incantation invoked were Aziel, Castiel, Lamisniel and Rabam. Rabam

Appearances

 * Season 2
 * In My Time of Dying
 * Houses of the Holy
 * Hollywood Babylon
 * Season 3
 * Bad Day at Black Rock  (mentioned only)
 * Fresh Blood  (mentioned only)
 * Season 4
 * Lazarus Rising
 * Season 7
 * The Mentalists

Trivia

 * Oddly enough, Castiel was mentioned in one of Sam's incantations. Whether or not this pertained to the angel is unknown.