Emril
Emril was a jet-black alloy of emrilite and other metals. Often known colloquially as “deep steel” or “dark steel,” emril, when smelted and magically forged, was ultra-hard, but the procedure was costly. It was most useful for weapons and armor, but because of its high cost and rarity it is seldom used by those who were not of high standing in either the drow military or noble families.