This thing can't stop ruining my day. When I just tamed my first level 115 raptor, level 90 and 55 of these killed my raptor. After that, I saw a wild level 150 raptor. I go back to my home, grab some meats, tranq arrows, bola, and a soothing balm to tame him. When I arrived, I saw him fighting a level 100 therizinoaurus and died. Really hate these things when they're wild.
If you find this thing RUN it took me out in two hits and completely demolished my home and murdered my raptor and my little otter cuddles please like to pay respects to my little cuddles kept me warm on the cold nights
I only got a chance of taming this sort of early in game because managed to find a good spot on top of a tall rock where it can't reach, and shoot tranq arrows. Scared to tame a 2nd one. It killed me in like 2+ swipes as I still was new then. Now the same Theriz that killed me once is my best friend.