To tame a high level (120-150) you will need 3-4 slingshots and around 120 rocks and just jump around it and pelt with rocks. Be sure to lure it away from other turtles or water and remember to not get cornered. After you have knocked it out give it around 40 purple berries (mejoberries) and if its torpor is draining fast force feed it the blackberries (narco berries). Once awake name it and craft and equip the saddle. It’s used for an early game semi aquatic tank that is slow on land and moderately faster in water but very tanky and does a fair amount of damage, they can also be used as early game refrigerators until you unlock a preserving bin.