You'll need to do some serious preparations before starting the first level of the Mystic world. Make sure all of your captains are level 18 and partners are level 15 or above. This is Mugen's home world. You'll need to clear some stages to reach him though.


This map can be hard without preparing. To have an easy time winning you'll need to use an element changing item to change one of the altar's attributes to fire. You'll only be facing wyverns and they're weak to fire. You'll cut their health in half in an instant. If you're lucky some might take out other enemies or their entire bases.
The wyvern kings can be tought because they can attack in 360 degrees. Have your captain wait and have your units fight the king.
This level is pretty easy if you change the elements to fire.


This level is pretty simple. The map is small and there are only four enemies. We've faced ogres before so we know how strong they can be. Let them come to you an take them out one at a time. Ranged captains are best to use since your units can distract the ogre. Mugen can be challenging so make sure you run and send in another unit if they are low on health.
Once Mugen is defeated Rose will absorb Mugen and you'll have to kill her to finally defeat him.

This map is even simpler than the last one. Rose is the only enemy in your way. Send all of your troops and make camps next to Rose's base. Send them one at a time trying to pick away at her health. Use all of your abilities and items to guarantee your success.

After you kill her you've completed the divine world part of this game! There are two others parts left and reaing through this should help you beat the other two.