[Source] Allya's Exile was a powerful crystal sometimes used in lightsaber construction. The crystal imparted an incredible burn affliction when used during combat, generating an outstanding amount of heat. The crystal was named after the Rogue Jedi, Allya. The Allya's Exile crystal gave a lightsaber blade an amazing scarlet color which reflected the special color crystal's unbelievably hot qualities. It was similar to the Sigil crystal in usage. Nonetheless, Allya's Exile exceeded the properties of a Sigil crystal completely.