Demolitionist

The Demolitionist is an NPC vendor that will spawn once the following criteria have been met:
 * There is an empty house.
 * You have one of the Explosive Consumables in your inventory.

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

The Demolitionist's appearance seems to be based on dwarves from many games, films and works of literature. He is significantly shorter than other NPCs and has a beard. Furthermore, his mining helmet, lantern, and the fact that he sells explosives fits the trope of dwarves preferring underground environments. He and the Arms Dealer also seem to have a rivalry.

Quotes

 * "Dynamite, my own special cure-all for what ails ya."


 * "Explosives are da' bomb these days. Buy some now!"


 * "Why purify the world when you can just blow it up?" (Only if Dryad is present.)


 * "It's a good day to die!"


 * "I'm sure the nurse will help you if you accidentally lose a limb to these." (Only if Nurse is present.)


 * "I wonder what happens if I... (BOOM!)... Oh, sorry, did you need that leg?"


 * "Even the gun dealer wants what I'm selling!" (Only if Arms Dealer is present.)


 * "I've got something for them zombies alright!" (Only during a Blood Moon.)