get a fire wep from a quest or you can forge one wep

That is soooo the simplist thing ever. U get 2 friends (i recommend getting artix and
glanoth). Then u battle each head one at a time. Be sure to defeat it before it switches
head, or you're gonna get screwed if it keeps switching. After u beat it, use ur potions
till u get full hp and mp. If u don't have enough, walk to the chest and use potions till
you get full mp and hp, then get full potions again and fight the next head. I hope i was
usefull. Oh, and one more thing get a fire, energy/electric weapon so u can defeat the
heads.