This thing is usually roaming with other dinos and roars to mind control them so when found you have from 3 to 6 carnotaurus to deal with on top of it (encountered 3 in this situation in the snow biome on the center map). Level wise its random for all. May want 2 higher level spinos or 2 higher level rexs or some sort of force to take them on. Good luck!
No offense mobile players, but it's really annoying to try to look for helpful information, and be flooded with that, "please put it on mobile". They took it out probably because of lag, so, just please, stop spamming this stuff.
First day it was released, started a new character made a stone house boat and headed north. Was docked, taming a direwolf. Suddenly it drops from a cliff with 3 carnos. They surrounded my boat and wiped me in three minutes. If you see the buff, gtfo.