Boss Worm

The boss worm will attack suddenly when you move near his spawn area. He is undetectable until he spawns

HP: ~75

Strategy
It's best to avoid the worm while it lunges. After it poison spits, it will move slowly back into the ground, this is the best time to attack it. Try to hit multiple "spheres" that he is made out of with a long weapon, this will deal more damage based on the amount of spheres you hit.