I tamed a lvl 45 therizinosaurus with 20 darts and a normal longneck rifle, but the really hard part was keeping it down. i had only 160 narcs and i thought it will be enough, well it wasn't.I had too run and get narcoberries and come back and make them into narcs until it tamed, and it took like 45 min but it pull it off, so I suggest you prepare 300-450 narcs if you want to tame it.I hope this helped you!

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