The Delverr Dwarves delved beneath their isolated keep and discovered the mystic substance called BlackStone. Through arcane magicks and devious incantations, they were able to meld this material with useful capabilities, but the attention of dragons from the deep made this a perilous endeavor. These dice were the only items to survive, scathed by dragonfire and weathered by time, they still may contain those magicks imbued in them from long ago.
These solid metal dice are made from zinc with red enameled letters. They have a heavy heft so use them with a dice tray or dice tower for best protection of your gaming table.