1. After conpleted Level 8, get back to Horon Village.
   Meet Tree-Maka and talk to him. He gives you Maka-Fruit.
   With Maka-Fruit, go to Onox's Fort.
 

2. No map inside the fort is prepared.
   The route is simple. Go up(north).
   All you have to do is "DEFEAT ALL ENEMY IN THE ROOM".
   Unless you defeat them all, you will be put back to the entrance.
   Finally, you get to the Boss room.
 

3. Boss: Onox - STEP 1
   Onox in first state : Use Sword in 'Circling Attack'.
   Iron ball that Onox swing reaches quite long. You need to
   jump with Feather Mantle or use Fast Fruit to yourself
   to escape from Onox's attack.
 

4. Boss: Onox - STEP 2
   Onox carry iced Dyn as a guard shield.
   You must use Season's Rod to take Dyn away from Onox
   and then circling attack.
 

5. Boss: Onox - STEP 3: The final state
   Onox in the final form.
   The only place you can give damage to Onox in this form is
   its Red Frame in Head. When Onox try to grab you by hand, 
   jump on to its hand and jump towards its red frame and cut it.
   When Onox bend down towards you, use shield to guard.