So i was playing ark as a level 71 and i saw this, i first thought it was a rex, but when i got closer to it i then was like "OH SH*T" so i got on my argy and when back to base and made 800 trank arrows, and i went back and it was attacking some stuff and i kept shooting it while it one shot the animal (if ya realy wanna know it was a diplodocus) and btw this was on mobile, so when it aggro on me i was thinking "im dead" but nvm the rock was too high for it! So i just shot it in the face with all the trank arrows i had, and when it started to run it ran F A S T. So while shooting it while running, (i got out of stamina alot) when i finally knocked it out i soothed it with a major soothibg balm, and i put 4 stacks of prime meat and 60 stacks of meat, but nevermind! It ate only ONE prime meat with the major soothing balm. I was freaking SHAKING. And btw you'll need alot ALOT of biotoxins BEACUSE its UNCONSCIOUSNESS goes down so fast. But only if you dont have major soothing balm. Cya!