Bone Serpent

Type	Burrowing Enemy
Environment	The Underworld
AI Type	Worm AI
Max Life	250/500/750
KB Resist	100%
Banner	Bone Serpent Banner
Immune to
Coins	1230
Hurt	https://terraria.gamepedia.com/File:NPC_Hit_2.wav
Killed	https://terraria.gamepedia.com/File:NPC_Killed_5.wav
Digging	https://terraria.gamepedia.com/File:Roar_1.wav

Bone Serpents are burrowing worm-like enemies that spawn in The Underworld. They are immune to lava as well as the Poisoned, On Fire!, and Cursed Inferno debuffs. Bone Serpents consist of 14-20 segments in total.

Segments[edit | edit source]

Classic

Expert

Master

2 values: Pre-Hardmode › Hardmode
3 values: Pre-Hardmode › Hardmode › Post-Plantera

NPC ID		Damage	Defense
39	Bone Serpent Head	30/60/90	10
40	Bone Serpent Body	15/30›30›26/45›45›39	12
41	Bone Serpent Tail	10/20›20›18/30›30›27	18

Bone Serpents are not restricted to The Underworld, and can follow the player out.

As with most worms, weapons that can hit multiple segments at once are effective. Some effective weapons are the Vilethorn, flails and the Crimson Rod.

Bone Serpents are one of the few pre-Hardmode enemies that don't get stronger upon reaching Hardmode in an Expert or Master world.
Sometimes a Bone Serpent can be seen leaping in the lava in the background as ambience.

The Bestiary entry for the Bone Serpent: "Mighty serpentine dragons once ruled hell, but long ago shed their obsidian scales. A skeletal husk is all that remains."

Desktop 1.1: All segments now share a life counter, instead of individual life counters for all segments. Previously Head, Body and Tail had 120, 150 and 200 health, respectively.

Desktop 1.0.6:
- No longer drops Sunfury and Flamelash, which are found in Shadow Chests instead.
- Now has a new death sound.
- Bone Serpents' hit-boxes have been recalibrated.