When you have a walking wound in the world simply stepping through walls, grabbing trinkets and casually throwing attackers away with telekinesis rather than engaging them... it makes things interesting. Rumors circulate. Rumors about a demon cloaked in darkness and fear, making no secret of its movements when it steps out of the shadows, openly collecting eidolons.
Out of their view, the fight to claim the other eidolons is surprisingly difficult, considering everything wants to eat me when I'm NOT actively engaging it, and as time passes... I'm growing weaker by the day. Not much, but notably. Much faster than I'd anticipated; by the time I hit the ten year mark I'd be utterly unable to care for myself. Not a pleasant scenario.
Pushing myself harder than I ought, I ensure that all the Eidolons are collected within a three years. (Though the mess with the little girl does not make me happy to deal with, it gets dealt with, and that's the reason it took three years, and not just a month.)
Unlock the Shimmering Islands? Easy. Charge the fortress Pandemonium? Sure. And while I'm at it, I'll be happy to throw an army of magitek constructs into the fray with the Eidolons as they fight the Genomes. Garland is of course less than happy to make my acquaintance, a genome without an origin, cloaked in shadow he cannot penetrate. Fortunately, I am not obligated to care, and the magitek militia is most helpful in dealing with the Genome horde.
And then Kuja and Necron show up. The magitek militia breaks while trying to deal with them, protecting the eidolons to the best of their ability. I expend two extra lives in the fight, which would be impressive if I weren't at a disadvantage (not to mention, if I could call down orbital strikes). But eventually, all's well that ends well; Necron feels as though it should be considered the grim reaper, but it is decidedly not, because I bisected it with a weapon that has killed gods. Pretty sure he doesn't count as a god.