Each Lucavi is connected to a shard of Auracite, called a Zodiac Stone, which serves as a conduit for that Lucavi to exist in Ivalice. Each Lucavi also has a human host, allowing them to interact with others in Ivalice without drawing attention. The Lucavi can switch between human and demon form via their Zodiac Stone. Lucavi return as Espers in other Ivalice games, notably Final Fantasy XII and Final Fantasy Tactics A2: Grimoire of the Rift, though Elidibus is known as his summon Zodiark.