Umbrite

Umbrite is a shiny, purple-tinted black metal, similar in appearance to obsidian, and associated with the element of Shadow. It is most commonly found in the elemental Plane of Shadow and the Wastes.

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The ethereal and physical elements
Basic elements	Ethereal elements: Physical elements: Ig Aq Cm Ld Ir U Cp T C As N Ch
Other elements	Nonelemental metals: Silver ▪ Gold ▪ Platinum Polyelements