“Not all of the League's soldiers took Catria of the Whitewings at her word. Some insisted her plea was a ruse, a trap concocted by Princess Minerva herself Marth doubted that, though; he had seen the woman in Lefcandith Valley, and she did not strike him as a sort of conniving menace his followers feared. As the brunt of Grust's might drew closer, Marth led the League to Castle Deil, determined to attack the citadel and rescue the young Medonian princess, Maria.”
—Opening Narration in Shadow Dragon
The following part of this article contains strategy; therefore, it is subjective, and may not work for everyone.
Recommended Classes: Cavalier, Knight, Archer or Hunter, and Mage, Sage or Bishop.
The chapter is not very difficult, except for the reinforcements which appear during Turns 5 and 9. A good strategy is to place a powerful lance-wielder with a Ridersbane up front, and back that person up with a sword-user with a Armorslayer and possibly Caeda with her Wing Spear.
Send Marth and a couple other strong characters into the castle to rescue Maria. Minerva will come towards you once Maria is recruited.
After you have defeated the reinforcements and recruited Maria and Minerva, head to the western part of the battlefield and defeat any enemies that might be there. Stock up at the armory and then defeat Zharhov, just like you would any other knight or general.
TIP: You can bring a thief or Marth with a door key or two. It will make your round in this chapter a lot easier.
TIP: The reinforcements of this level can easily kill a low defense unit even if they are high level. Be careful when taking care of them.
TIP: Bring a knight into this chapter and it will be helpful. Use the knight to create a choke point in the narrow south entrance of Castle Deil. The reinforcements will 'find it hard' to take down your choke point.