Battle 9:

Mikhail vs the Abyss Monsters

The enemy can use Magic to change the geography.

This battle will only show up once you have sealed the 4 gates.

Mikhail (4000) vs Bonaparte (4000, Illusion)

This battle can be amazingly difficult if you aren't careful.  Use the Gush Wind formation (as always) so you'll have the upper  hand in speed.  Now, use Intel L 1 to put the monsters into Forward Attack.  Use Spd Atk Fwd, and you should be able to push them to the edge of the screen before it wears off.  Usually, they'll call an All Charge once they are pushed this far so use your own All Charge.  By preforming the battle this way, you won't have to worry about their Illusion Tactic changing the terrain.

Looks foreboding doesn't it?  The battle isn't too bad...

Once the Intel Operation wears off, you should have almost finished off their army.