I couldn't miss the chance to practice my drawing!
Ultimate Illusion (究極幻想, Kyūkyoku Gensō?) is a recurring ability mostly associated with Gilgamesh. It is often used as his Limit Break or ultimate ability in his appearances. Ultimate Illusion was not used in his original appearance in Final Fantasy V, but in Final Fantasy XII.
Ultimate Illusion appears as the most powerful of Gilgamesh's card abilities.
"Ultimate illusion" is a synonym for "final fantasy".