Steelwood

The Steelwood tree has melded plant fiber and metal vein into a new sort of flora. Those of a more druidic persuasion can form it into simple tools such as cutlery and arrowheads. those of an industrial persuasion can debark and melt the trees down into a more usable state.
Found in varying forms across the Known World, the Faun of the Black Forest are best known for their use.