From Granblue Fantasy Wiki
Ultima Core is a material used in the creation of Ultima Weapons.
Currently only three Ultima Cores can be obtained per player, limiting the amount of Ultima Weapons you can craft.
|Upgrade Rusted Weapon to Atma Weapon||1|
- Host and defeat Ultimate Bahamut (Normal) for the first time.
- Host and defeat Ultimate Bahamut (Impossible) for the first time.
- Treasure shop (1 for )
- Ultima Core is reobtained when reducing Ultima Weapons.