The Nymph is a very rare enemy that spawns in the Cavern layer. When encountered, it appears as the Lost Girl, who seems to be a helpless NPC in need of rescue. When a player gets close, it transforms and attacks as the Nymph, a dangerous enemy that deals high damage (for a pre-Hardmode enemy).
It is one of the few enemies that can be detected by the Lifeform Analyzer.
- Minions and other enemy-seeking weapons will target the Lost Girl before she transforms into a Nymph.
- Nymphs spawn less frequently during Hardmode (because while the spawn rate increases so do the amount of enemies that spawn, making the Nymph's spawn rate go from 0.6% in pre-Hardmode to 0.1% in Hardmode)
- Nymphs spawn more often in the Cavern layer, not the Underground layer.
- It appears to spawn more frequently on the Console versions and Mobile versions.
- Before the Lost Girl is transformed into hostile Nymph form it takes damage from foes and can indeed die. It still drops items (including Metal Detector) if killed by monsters.
- While the Nymph is indeed one of the rarer enemies in Terraria, it spawns more frequently than is initially apparent, and is often missed due to its initial stationary behavior. It often remains in dark areas, without making its presence known by moving to attack players as most enemies would. Once a player acquires a Lifeform Analyzer (and keeps an eye on its information display), the Nymph's actual spawn rate can become more apparent, and its drops easier to acquire.
- It cannot attack from a distance, nor can it jump very high. Use a ranged weapon from an out-of-reach position.
- A Harpoon, Flail, Boomerang or Yoyo can be effective, as Nymphs can be stun-locked. Even with its high health, the Harpoon can kill a Nymph in moments with no risk to the wielder, due to its extremely high rate of fire, so long as it is used at short range.
- A Hunter Potion, Lifeform Analyzer, or both can be useful for finding Nymphs.
- In Expert Mode, the Lost Girl form has twice the health of a normal friendly NPC. This makes it suspicious even on a first time encounter.
- In Greek and Latin mythology, a nymph is a lesser female deity who served the god of nature, Pan.
- The left half of the Nymph Banner is of the Lost Girl, while the right half is the actual Nymph monster.
- The Nymph is more like a siren, a female monster that charms everyone with her voice, which Odysseus needed to face.
- The Nymph Banner is one of the rarest items in Terraria, due to having to kill 50 Nymphs, and they are pretty rare.