The Crystal of Ix is a powerful crystal in possession of Mozenrath. It is one of the magical artifacts Mozenrath obtained after dethroning Destane and transforming him into a Mamluk. It appeared in the episode "The Secret of Dagger Rock".
The Crystal can be used to trap any being, magical or otherwise. Whatever is caught in its green beam is pulled inside. There are two magic words to activate it: To trap a target, Mozenrath says Ixtala; to release, he says Ixtabor. Mozenrath intended to use it to entrap Genie to obtain his magic. Mozenrath eventually creates a monumental version of the crystal out of Dagger Rock itself. When Mozenrath prepares to trap Genie, Jasmine grabs Mozenrath's cape and positions him in front of the beam, trapping him and Xerxes inside the crystal.
The Crystal of Ix returns in "The Hunted", in which Mozenrath hires the Mukhtar to bring Genie to him. In this episode, Mozenrath successfully captures Genie within the crystal.