Elven high magic

Elven High Magic (Arselu'Tel'Quess in elven or the Great Art of the People) is the term used to describe one of the most powerful forms of magic practiced in Faerûn. Casters of this magic are called Selu'taar, also known as the "Art's Disciples" or simply as "High Mages". High Magic spells are powerful enough to affect deities or to create world-changing spell effects. Non-elves cannot cast High Magic as they are simply unable to wield such power without being consumed by it, and in truth even most elves are found lacking in the necessary finesse and skill.

All High Magic spells are rituals, and they frequently require collaboration of more than one High Mage. In addition, the necessary material components and timing of High Magic can be very specific. For example, in 1375 DR a priest of Vhaeraun used a High Magic spell to open the realm of Eilistraee to Vhaerun, in order that he might slay her. The components for this mighty ritual was a cavern filled with magical darkstones. The spell could also only be cast when a certain specific configuration of heavenly bodies existing in the skies of Faerûn.

Another example of High Magic was used by Quar'y'land Melarn (spelling) to wipe the name of Kiaransalee from the minds of her worshippers, thus eliminating her mortal followers. Due to the edict of Ao, any deity without mortal worship can no longer exist. Kiaransalee ceased to exist in the realm of Toril.

Types of ritual
High Magic rituals are roughly divided into three different types.

Rituals of Solitude
Rituals of Solitude are the lowest-level, touching the direct source of magic the least, and they can be cast by a solitary high mage. Despite their name, many of these ritual spell effects can involve bolstering the morale of entire armies of elves or of demoralizing their foe's forces.

Rituals of Complement
Rituals of Complement require three high mages working in tandem, and they require more time and are more complex. Effects include creating permanent gates, the creation of many magic items at once, or of creating a phantasmal illusion capable of hiding an entire elven homeland.

Rituals of Myriad
Rituals of Myriad are the most powerful form of High Magic and require at least five high mages, though some of these rituals require many more participants. Examples of Rituals of Myriad include the creation of the Mythals of elven cities.