Using the contents of Torwa's Pouch, summon Lar'korwi and defeat him. Then bring Lar'korwi's Head to Torwa Pathfinder near the entrance to Un'Goro Crater.
This will be the most difficult part because there is some complexity to the plan. Continue following the river to the north, and look for a bend in the river. It was here I saw Lar'korwi last. You will know you are in the right area because of all the bones from massive creatures that once wandered nearby.
Take the meat you recovered and place it there. Then, rub this mixture I created on the meat.
If both lures mingled together do not bring Lar'korwi to you, then I know nothing else that will.