step 1: buy genesis season pass

step 2: grind genesis 2 until you have the net projectile

step 3: go to a mission terminal and put the net projectiles in its inventory

step 4: go to an obelisk(on other maps) and take the projectiles

step 5: craft a harpoon launcher

step 6: shoot the net on the yuty and kill carnos(preferably with rex) shoot another net on the yuty

step 7: k.o. yuty

step 8: TAME.... THE.... FLUFF REX

-thank you for reading through. hope it helped.