When you fight the worm make sure you use a oil jar and set it on fire when it chases you.

Tame a 100+ megatherium and enrage is by attacking creatures that give you chitin. This will give you a damage boost and a damage resistance boost. Level up melee and you will easily be able to kill a death worm

ice worms have around 1700 instead of 20000 (ragnarok)

Whatever you do, don't fight it with a rock golem. On a raid my tribe baited an enemy level 130 rock token into a level 1 death worm and the worm destroyed it.

Not tamable, get out of this section