Truffle

The Truffle is a Hard Mode NPC added in 1.2, for him to arrive, you need to build a 2 block thick Mud bridge, and use Mushroom Grass Seeds to make an above ground Glowing Mushroom Biome. He also must have a house that meets all other NPC standards.

Quotes
"Between you and me, [Dryad's Name] is the only one I trust. She is the only one here who hasn't tried to eat me or use me in a potion."

Names
Amanita