Orcslayer

Orcslayer, or blood-metal, was an alloy of steel was that was poisonous to orcs.

History
In the late 6th and early 7th centuries DR, dwarves were determinedly expanding into the orcish kingdom of Vastar, and attacking the orcs. Working secretly with a few humans and elves, they sought to develop a steel toxic to orcs, and succeeded with the metal they called "orcslayer".

In the Year of the Spellfire, 610 DR, armed with their new orcslayer blades, the dwarves surged out of the mountains to slaughter the orcs of Vastar, quickly toppling the kingdom and driving the survivors into the mountains.

The sage Fairin Icemantle expressed great reservations about orcslayer metal, and wrote the Treatise Against Blood-Metal to protest its use. He feared that it would lead to the development of other alloys toxic to many races, and spread death and destruction.

Fortunately, the art of making orcslayer metals was lost by 1370 DR.