Lure one into a closed trap and seal it off, a 2x2x2 will suffice. You'll leave one wall open until it's in and then place it. A doorway and door on the other side. After that add ceilings and go out of render. Once you come back it should be calm and you can feed it through the walls easily as they almost never move.

How to tame a mantis the dangerous way

Get Deathworm horns by killing deathworms

Get a flyer and put it on passive

Fly over a high level mantis and jump on top of, then passive feed it.

Run away from the mantis if it doesn't tame right away

Do it again if it doens to work the first time

Taming a mantis?

You’ll need Deathworm horns for faster tame

Woolly rhino for slower

Ghille suit and bug repellent

It will be easier to trap the mantis than to tame it out in the wild as it will aggressively attack almost anything in sight, make sure there’s no corpses either, but once trapped and deagros on your stone trap, you can slowly tame the mantis, if it doesn’t stop deagroing on your stone trap you might have to break it, once you have your tamed mantis have fun!

You don’t need ghillie or anything really. Just pick it up with a wyvern and drop it deep in the ocean. It won’t aggro and can just feed it in the water. If it does aggro then fly out of render and back and it will work. Some of these other guys making these too difficult and are noobs. Always take the easy route.

I love how if you aggro these things mid tame they’re impossible to reset by flying away, and they seem to aggro at random. I have ghillie, bug spray and cactus broth, didn’t even touch this guy, was behind him, crouched, and he still aggroed. Yesterday, spent an hour trying to tame this same idiot and on the last horn it stopped giving me the proc. He wasn’t aggroed, wouldn’t aggro, just stood there. I logged out and in and he was aggroed, just glitched. I’ve seen videos of people doing this in just ghillie, walking right up to them, I’m wondering if on PC the mechanics/aggro range/sensitivity is different than console.