Dark alloy

Dark alloy was a forge chant employed in the making of dark steel items by dwarves.

Effects
The spell transformed iron into a metal with unusual properties, which became invisible in sunlight and glowed in darkness. The dwarves of Faerûn called it dark steel, and often used it in weapon filigree or in the making of runes for shrines.

Components
Besides the chanting common to all forge chants, it required an ounce of mithral.