Illusion

Illusion is the school of arcane magic that manipulates the external world or the senses of sentient beings to produce images, feelings, or similar false-perceptions. Because of its association with tricking the mind, illusion is looked on by some as a school practiced by scoundrels and worse. Indeed, thieves, assassins and other dabblers in shadow magic often employ a range of limited illusion effects. A practitioner of the school is referred to as an illusionist.

Invisibility
A staple illusion spell is the invisibility incantation. Typically, to cast such a spell, a mage either creates a field through which light can pass around himself, or directly manipulates the senses of his viewers to instantaneously erase any trace of his presence. Invisibility spells can also be cast on inanimate objects, with the difficulty of doing so depending on size.

Spells similar to invisibility can mask magical auras, employing the same method to avoid or erase detection.

Illusions
Mages, as detailed in the Stormwind Circle Mage Tome: Illusion by Archmage Firebane, can cast two types of illusions. Figmentary illusions alter the senses to create false perceptions; the perceptions created do not exist at all, however, and cannot interact with the physical world. Phantasmic or phantom illusions, on the other hand, create images with a modicum of reality to them. Mirror images of the caster are the most commonly-employed phantom illusions. These are created as a reflection of the caster's mind, and infused with shadow energy to give them reality.

Mind-Control
More than mere manipulation of the senses, mind control spells assert absolute (or near-absolute) control over the mind of a sentient creature. This can allow the caster to possess the victim, temporarily removing himself from his body to see through the possessed victim's mind. More commonly, it allows the caster to issue orders (either verbally or telepathically) to the spell's subject. Because of the disturbing ethical implications, mind control spells are frowned upon by nearly all organized sects of mages.