Goblin Tinkerer

The Goblin Tinkerer appears in the Underground and in the Underground Jungle as a Bound Goblin after a Goblin army has been defeated. He will randomly spawn near you while you are exploring. Talking to him in this state will free him, and he will wander the area until he gets killed by any nearby enemy or hazard, or until you move far enough from him. After that, he will move into an available house like any normal NPC.

Goblin Tinkerer has the option to reforge a weapon, tool, or accessory for a variable price in Gold.

Once the Goblin Tinkerer has moved into a house, he will sell the following:

Quotes

 * "Hey, does your hat need a motor? I think I have a motor that would fit exactly in that hat."
 * "YES, gold is stronger than iron. What are they teaching these humans nowadays?" This is likely a reference to the fact that gold's actual Mohs rating for mineral hardness is significantly lower than iron, gold being a very ductile metal.
 * "You know, that mining helmet-flipper combination was a much better idea on paper."
 * "Yo, I heard you like rockets and running boots, so I put some rockets in your running boots."
 * "Silence is golden. Duct tape is silver."
 * "I just finished my newest creation! This version doesn't explode violently if you breathe on it too hard."
 * "I thought you'd be taller."
 * "Hey..whats [Mechanic] up to? Have you...have you talked to her, by chance?" (only when the Mechanic is present)