Even if you will have eaten before beginning the quest, you will keep your powers linked to prodigies and the food effect. To be successful, we advise you to go towards the center of the Island to get an axe and a swordfish, then go to a little Bogobelins camp where the first orb will be. Once in your possession, go back to the place where the quest started to put in the first orb (green sign on the map).
For the second orb, go in South-East (red sign on the map) and try to sneak in with stormy weather in the opponent's camp set up in ruins. The lightning will help you if you get caught because it will strike your opponent's weapons. The orb will lay near the pedestal, nonetheless, the latter will have to be freed of a cover.
For the last orb, it's a little more complicated: you will have to prepare for the fight against a Hinox lv.2. If you lack confidence, go around the island to look for resources and use the cauldron located near the last pedestal (blue sign). The last orb is completely tied to the strike of the half-boss, so either you fight him or you try to get the orb with a well-fired arrow.