A smooth silver disk

[Callisto]

exa disk
This disk seems to be made of pure silver, but is much lighter than expected. Both sides are smooth, and feel slightly warm to the touch. The disk has a diameter of about a foot.

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Any information on what this is or what it does will be greatly appreciated.

-Callisto

[Avaine]

The only real angreal in the game is a bear statuette. This item was a dreadguard quest that is currently on hiatus.