So I was finishing Final Steps on an alt when I started wondering. As far as I am aware there were/are three items mentioned in FF lore that have the capability to grant enough aether for summoning a primal on their own, disregarding any Alagan shenanigans I may be forgetting (Also, may be misremembering what the 3 items do with the aether, but still.)

I can think of Nidhogg's eyes, taken care of after the Royal Menagerie, the Horn used to summon Alexander, also removed from the equation, and Tupsimati, which I am unsure of what happened to it following Shinryu's sealing.

Which made me wonder. Has there been mention of any similar artifact in the game that could be used in a similar manner? I can logically guess the Crystal of Light could in dire circumstances, but was anything else ever mentioned?