Question: what are dryads in terraria?
Answer: The Dryad is an NPC (Non-playable character) that will move into an empty house once you've defeated either the Eye of Cthulhu, Skeletron, Eater of Worlds, or the Brain of Cthulhu. ... The Dryad can tell you the percentage of Corruption/Crimson vs. Hallow in the world.