Bone Serpent

The Bone Serpent is an enemy found in The Underworld that can move through walls. It is the strongest of the non-boss enemies. The only burrowing enemy stronger than the Bone Serpent is the Eater of Worlds, which is a boss.

Every segment of his body has 150 HP, except the tail, which has 200 HP and 3 higher defense, and the head, which has 120 HP but 1 lower defense. The Bone Serpent's HP is not shared between those parts. In order to kill him, you need to destroy at least one part of him. The tail can be "killed" without the killing the rest of the Bone Serpent.

The Bone Serpent is, like all burrowing enemies, immune to lava. The Bone Serpent may, rarely, drop a Sunfury, Flamelash, Flower of Fire, or a Plumber's Hat (The chance is 1/100). Each section of a Bone Serpent will drop loot, but as they are usually defeated by destroying one segment of their bodies they seem to drop only one item. Applying large damage to multiple body sections at once with dynamite will result in loot from every body section. This can drastically increase the loot gained from Bone Serpents and is a great tactic when searching for the elusive Sunfury. If you just want to survive a Bone Serpent, you can use a Grappling Hook on a high ceiling and he will NOT be able to reach you, where you can leisurly shoot at him with ranged weapons.

It has been found that instead of disappearing, the Bone Serpent will frequently die offscreen without any player interference. This has been the source of the rumor about them being affected by lava. There has been at least one instance in which a bone serpent's remains were found next to a torch, this may point to a bug in which torches can kill burrowing enemies VERY rarely and only IF they are off-screen. In addition, unlike other non-boss monsters, the Bone Serpent will die a few seconds after the player dies. This behavior is usually reserved for boss monsters; it is unknown if this is intentional.



&nbsp A glitch may occur where its body is missing and it's just a Bone Serpent's head digging around. This is very rare and there is no known way to recreate this consecutively. Also, the glitched head randomly died shorty after it was seen.