Bone Serpent

Bone Serpents are the strongest non-boss, non-hardmode burrowing enemies. They follow the Worm AI. Bone Serpents, like all other worms, are immune to lava. They are also immune to the Poisoned and the On Fire! debuffs.

The best way of killing one is the same as killing any other worm, by shooting the floor with a harpoon which will almost instantly kill it or, by using weapons that can hit multiple enemies simultaneously like the Blade of Grass, a flail, or the Vilethorn. When fighting them it is recommended to have a lot of potions, end game armor and weapons to be able to stay alive for extensive periods of time. They may also rise out of The Underworld into the cavern layer during night time and their spawn rate is increased.

Bone Serpent consists of 14-20 segments in total. It drops loot from the head segment, which can get stuck in blocks, requiring a bit of digging to retrieve.

History
Serpent d'os Bone Serpent Bone Serpent Костяной змей