Bonemaw has 1,100 health and spawns in the Ashlands.
It takes extra damage from frost; it resists poison; fire and spirit do nothing to it at all. Blunt, slash and pierce land at full damage, so that is what to bring.
Its hardest hit is bite at 140 slash, out of 3 attacks.
Some of what it throws is elemental, so fire and poison resistance is worth having.
Of everything craftable, 
Frostfire Crossbow, 
Frostfire Sledge and 
Thunderblood Crossbow put the most damage through what it resists.
It always drops 
Bonemaw Meat and 
Bonemaw Tooth.
Bonemaw is a serpent that patrols the boiling water around the Ashlands, and the main threat to a ship crossing to the biome. It has 1,100 health, is immune to fire and spirit damage, resists poison and is weak to frost, and it swims at 12, half again as fast as it runs on land. It launches three fireballs from 10 to 30 meters out for 40 blunt, 20 fire and 20 poison each on a 20 second cooldown, applying Burning and Poison, and bites for 140 slash within 3 meters every 10 seconds. A kill leaves 8 to 10 Bonemaw Tooth and 6 to 8 Bonemaw Meat floating on the surface, plus a 33% chance of a 
Bonemaw Trophy, which sinks instead.
They are immune to fire, weak to frost, and entirely uninterested in fair fights. A drakkar with speed up survives the crossing; frost arrows or the harpoon-and-shallows trick from serpent hunting finish one for its teeth and meat. Do not swim. The water is boiling anyway.
| Where | Roll | Group | Conditions |
|---|---|---|---|
| Ashlands | 20% every 1000 s, max 1 near you | 1 | none |
Each 64 m zone keeps its own timer per entry and rolls the chance once per interval while loaded; a zone never loaded before rolls the moment you arrive. The spawn lands 40 to 80 m from a player, never inside a base unless noted, and "max near you" counts the loaded area around that zone. Dungeon and camp spawners are separate and not counted here.
With devcommands enabled, this spawns Bonemaw in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: BonemawSerpent · all console commands and IDs