Skeleton Merchant

The wandering skeleton vendor of the Cavern layer.

The Skeleton Merchant is a unique vendor NPC in Terraria who appears at random in the Cavern layer. He is not a town NPC and despawns when he is off-screen, although enemies will not spawn near him.

Quick Facts

Type: Wandering vendor NPC
Found in: Cavern layer

Facts from the source article.

Background

His stock changes every day at dawn without him needing to respawn, and most of what he sells depends on the current phase of the moon. He fends off nearby enemies that are not skeletons by throwing Bones at them, while ignoring most other skeletons. Unlike other NPCs, he has no icon on the map. He cannot spawn while a Shadow Candle is placed nearby or held by the player, and a Hunter Potion or a Lifeform Analyzer helps in finding him.

What players say: Player verdict on Terraria — Rotten Tweets