Trapped a lvl 140 surrounding it with stone pillars. Took about 12-14 tranq darts with journey man longneck. After starve taming around 40 minutes and 125 narcotics later, it was time to feed it. I used exceptional kibble, one tier above superior kibble. It ate 10 of them and bam got me a 199 after tame. Health 3060, Stam 648, weight 438, melee 256. Not bad for my first casteroid.

Note! Torpor drain is insanely high!!! I brought 200 narcotics just in case.