I dare you to raise one!! They are savage if you got two high lvl parents (about lvl 140ish) and you get imprinting on it. The thing will become an adult with about 230% melee and basically one chomp any bronto!!! But on the down side you loose your job and your girlfriend
Get at least 3 to 5 tranq arrows (probably too much) just in case and go up to a parasaur and shoot it with a bow or crossbow in the head. Boom easy. Get at least 100 or 50 berries. Starve it out for a fast tame.dont forget narcotics
Valguero Taming Guide: Mantises spawn at the bottom of the Wyvern Scar. To tame them, first you will need to go to Scorched Earth and wall around the North, West, and South deserts at the perimeter of the map. Each circuit around the map should give you 5-10 horns. Horns can be collected from Iceworms in Ragnarok as well.
Once you have your horns, equip a full ghillie suit and bug repellant. Approach the scar from the East, and you should see two cliff platforms in the snow at the entrance to the Scar. There will almost always be several Mantises on the ramp descending into the scar along with dung beetles, titanaboas, and arthros.
Clear the trash, agro a mantis, and run back up the ramp and onto the snow platforms. Mantis should lose agro on the platforms, and you can then start taming peacefully. Approach from behind with your ghillie suit and bug repllant, passive tame with the horns and feed every 3 minutes. Voila, easy Mantis. I tamed 4 in less than 2 hours like this.