Wrong category, go to Encountering

In order to fight death worms, get a rex with around 10k health and 200% melee damage. This lets you tank it while dealing loads of damage.

Use the horns to tame mantises for mantis kibble then you can get rock golems

Since everyone else's tips are stupid. If you want to find a deathworm, you can use k mode and look underground. If a worm is nearby, you will see it's body. You can use a land mount like a thyla or a flyer like the wyvern. If flying, point the flyer downwards to make controlling easier. As for fighting it....use whatever dino you have. Rexes are great, wyverns too. Wolves are effective against the worms as well as the alpha to. If you plan to live out on the dunes in SE, be prepared to have random encounters time to time. These worms CAN destroy thatch-stone-adobe. My solution was to just use my rex army but wolves work great early game.

The absolute easiest way to fight these is with a megatherium, any level will work just make sure you have a bug buff active and you can chainsaw through even alphas with ease.

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

Megatheriums are excellent for killing them including alphas. just murder bugs around the desert and the bug killing buff will allow you to tank hits and deal loads of damage :D

It has chance to drop black pearls.That's almost the only way to obtain black pearls in scorched earth.

Have a Petra and oil jars and flame arrows when the death worm comes at you set the oil on fire and when it goes under just go to the same spot easy XP or horns

If you’re on ragnarok and want horns, go to the ice cave. The ice worms are easier to kill.