Celestium

An alloy forged by certain celestials that draws many structural similarities to mithral. Celestium is considered much rarer than mithral as only celestials are known to cast it. The constituents of celestium remain unknown and may have inspired the creation of mithral. Although very similar, celestium shares identical characteristics as mithral with some differences:

-Celestium appears as a golden or brass looking metal rather than silvery.
-Celestium offers no decrease in spell failure chances.
-Celestium glows a soft golden light in the presence of celestials or religious places, rituals, or items.
-Celestium armor or shields deflect up to 1d4 radiant damage (per piece donned) as harsh, yellow light. Armors are treated as one category lighter than normal.
-Celestium armor, like mithral, increases maximum Dexterity bonus by 2 and decreases armor check penalties by 3.
-Celestium weapons deal additional 1d4 radiant damage if glowing (see above)
-Celestium weapons, while lighter, have no change in size category or how they are wielded.
-Celestium items are considered legendary and use mithral’s masterwork item cost modifier multiplied by 1.5.