Template:Npc TemplateThe Professor is an early Hardmode NPC that spawns after the Wall of Flesh is defeated. Sells a variety of expensive items.
| Item | Available | Effect | Price |
|---|---|---|---|
 Key Mold
|
Always | Used to make special dungeon chest keys | 30 
|
 Ancient Technology
|
Always | Used to make Lunar Event-level weapons | 1 
|
 Bag of Dust
|
Always | Used for crafting bags with a variety of dust (vanity/light accessories) | 1
|
 Life Machine
|
Always | Increases maximum health of the player standing near | 25
|
 Bunny Cannon
|
Always | Placeable, fires https://terraria.gamepedia.com/Explosive_Bunny explosive bunnies] | 50
|