EASIEST AND CHEAPEST WAY TO TAME A REX

1) Tame a good stamina or high health pteranodon, argy or tapejara

2) Make 4 metal billboards with cementing paste and metal ingots

3) Find a rex, have the billboards in your hot bar and circle around the rex while placing them around(You can also do it easier when they roar)

4) Stay back and tranq it out

5) If you are in an unsafe area it is also nice to surround the rex with wooden spike walls when it’s knocked out

Good Luck taming!