Best place to get deathworm horns is in the ice cave on Ragnarok, can run in with a couple decent Deinonychus' or a Thyla and just shred them and they spawn frequently enough that by the time you get to the boss room and turn back you've got a bunch!

As of the latest update, these can now be tamed with rhino horns, though with lower effectiveness.

When Raising Babies, they eat Spoiled Meat !

Use bug repellent to get close to tame

These can be grappled so the easiest way to tame once you’ve acquired the horns is to go to the Ragnarok Highlands North and search the black coast for a high level. Use your grapple to grapple it and drag it into the water where it will deagro and you can feed it easily. Happy hunting survivors. 🦗

Dont me on lost island. Found lvl 90 Mantis and beat it with a club, realize it was a passive tame after knocking the hell out of the bug.

Use a megatherium to kill death worms (when they have the insect buff they get a 350% mele buff to insects <death-worms are insects> and take reduced damage) use a full ghille suite and bug spray when taming and have a tribe mate hold a mantis low to the ground with a wyvern while feeding. Fast and easy. Put the horns in taming slot…Walk up and feed then run out of agro until it’s ready to eat again and you have a new pet.

You need bug repellent, and a ghille suit to tame them than you crouch and sneak up behind it with a death worm/rhino horn in your last item slot and press Y on Xbox and E on pc

Fjourder now has dead death worms in the volcano area, and you can harvest their horns, in the oil deltas!

On Fjordur near the beach you can find what looks like stone/fossilized deathworms. These can be mined for horn

All you’re methods are old all you got to do is drop one in water and you can tame it without any Ghillie or broths !!

I don't know what other said. But in this day 26:4:2021

You can't tame mantis with any other thing or with help of anything but Bugrepelent and deathworm horn. Used 5 hour to learn it.

Make sure you're not taming one durring a sandstorm, it will cause the taming meter to degrade.

A good idea on Ragnarok is to drop one in the desert temple and block the exits with wyverns. The put on ghillie and bug repellent. If it goes aggro run over and get on a wyvern. Tamed 2 level 150s like this. Best way to easily get them. Another thing is avoid taking in open desert because if a death worm shows up you are screwed and so is your mantis. Good luck taming!!!

If you use a Wyvern and trap the Mantis under it's wing, then hop off insert the horn, then hop back on it's pretty easy. The Mantis won't agro on the Wyvern.

There is a great video on how to kill death worms very early game on YouTube by a guy named fresonis which involves using oil jars and flaming arrows to kill it and catch it on fire while it moves underground. This strategy is great for early game players with limited resources as it only takes around 4-5 oil jars and flame arrows to kill a level one death worm. This is a great way to farm horns for mantis taming.

These can be tamed thru walls just like shadowmane.. snap 4 dino gates with doors.. no ghillie or bug spray needed

How do you tame non violent things that try to kill you 24 7?

If your on ragnarok just go in the ice dungeon and farm the ice worm males for a bit. They spawn like every 30 seconds and drop horns and some other valuables

When breeding eats spoiled meat