So, fpr anyone wondering in the dark, here the solution and spoiler of this quest:
1: add VOID SALTS. just them and you are fine
2: add a BEAR PLET and 4 BEAR CLAWS. A bear will spawn and you can kill it. Take the special BOW from the fire pot
3: withe the SPECIAL BOW shot the animal icons. When you will shot in the right sequence, the fire below will turn off (the right sequence is. from the left, 1-4-3-2)