Bonus dungeons:
After finishing the game you will unlock two additional
dungeons that can be explored.
Easy class mastering:
Find a spot where you can encounter enemies and use
the spell titled Whistle to have instant battles.
Free Mystic Nut:
In the Orph region, before getting the woodsman to
join your party, go to the back of his shed. Talk to the squirrel
to get a free Mystic Nut.
How to beat metals:
Use Evil Slash. It will hit them roughly 50% of the
time, and do half damage. This is still enough to kill almost
any metal in one hit.