This guy trades you cool stuff, But he is sorta rude. Get iron and gold to trade with him. Find in villages. His goods are often quite expensive, and it is sometimes better to make the items yourself. That being said, he is good to have around, because some of his trade items are hard to get or available only in certain areas. Despite his appearance, Shadow Hunter is not very strong and not a good NPC for defence. Still, he is a worthwhile addition to any castle or village, and will prove himself quite useful, whether you are off questing or simply building.
Poison Hours Alchemist's Cauldron Alchemist's Laboratory