Dark steel ingot

Obtaining
You can loot at these locations:

You can loot  from the corpse of a:

You can buy  from these merchants:

can be crafted from these ingredients: for 15 crowns by a journeyman craftman, if you have the diagram.
 * 2 Dark Iron Ore, and
 * 1 Steel Ingot

Using
You can sell  to these merchants:

You can use  to craft:
 * Dark Steel Plate.