Illusions are an esoteric feat designed to delude the senses into thinking something that isn't real is, veiling appearances, or casting deceptions. Those who specialize in this type of art are called Illusionist.
Illusionists weave deceptions, capable of tricking someone into seeing something that's not there, such as a decoy, or altering their perceptions along with vision and sight, even connections. So far we've seen that illusionists use a powder to work their arts, but the deceptions tend to fail a third time when used. For an illusion to work, the illusionist must have the attention of the one they are deceiving.