The Lv. 4 Key Sphere, as its name suggests, allows you to unlock the Lv. 4 locks on the Sphere Grid. These are usually gating the biggest skills on the Sphere Grid, like Doublecast, Ultima, and the like. They are definitely more rare than the other Key Spheres.

Enemy Drops¶

• [Seymour Flux]
• [Spectral Keeper]
• [Land Worm]
• [Omega Weapon]

Enemy Steals¶

• [Nemesis]

Enemy Bribes¶

• Chimera Brain (196,000 gil for x2)

Loot¶

• Home
• [Mount Gagazet]
• [Inside Sin]
• [Omega Ruins]