The "Lucavi" are demons linked to the twelve Zodiac Stones who seek to gain control of Ivalice by resurrecting their defeated leader, the High Seraph, Ultima. Any person who holds a Zodiac Stone may make a contract with the Lucavian demon associated with it, and in doing so, become one with that demon. During the events of the game, the Lucavi manipulate the Glabados Church into controlling the War of the Lions to ensure enough bloodshed for Ultima's resurrection. A thirteenth Lucavi, associated with the sun constellation Ophiuchus, can also be found in a side-quest. Some of the Lucavi reappear as Totema in "Final Fantasy Tactics Advance", while a sub-boss, Gukko, becomes a "Rukavi" before his final encounter with the party, with an appearance similar to that of a vampire-type enemy. They also reappear in "Final Fantasy XII" as summoned Espers—with backstories that describe how they became known as Lucavi. It is also revealed that they were creations of the Occuria from "Final Fantasy XII". In the new translation of the PSP version of "Final Fantasy Tactics", the Zodiac Stones are also referred to as Auracite—the same stone used to summon the Yarhi and Scions (the Lucavi) in "Final Fantasy XII: Revenant Wings".