Astral

Unreleased Eidolons are the summons of Final Fantasy XV. They share their English name with the summons of Final Fantasy XIII and Final Fantasy Type-0

Gameplay
Summons in Final Fantasy XV are divided into a class system and ranking system. Large summons such as Leviathan are among the highest-ranking and most powerful. To be able to use the Eidolons, Noctis must either defeat them in battle or acquire them by other means.

List of Eidolons

 * Leviathan, a summon who attacks the city of Accordo.
 * Titan, a summon who will play a role in the story.
 * An unidentified Eidolon to be included in the Final Fantasy XV demo Episode Duscae.

Creation and development
During development of the game, the team intended to include Titan as the Eidolon players could access in Episode Duscae. However. they had to abandon this due to Titan's strong connections with the story. Instead, they included a different Eidolon so players could see what happend when you tamed or used one.