Fire Emblem: sword of seals chap11-14
All walkthroughs for this game stopped after chapter10 so i decided to make my own unprofessional walkthrough just so I could be of help to other gamers. But if you have seen any walkthroughs after chapter 10, please let me know! 
Chapter 11
First up, Elphin will join you at the start of the chapter. While the possibility of Geese to appear at the house on the bottom of the map depends on your previous chapter. In my case, he appeared so I made sure Roy would go down and talk to him. As Geese appears pirates will come from the forts. Be sure to bring a number of sword-users in your party. Bartre on the other hand will come out after some round at the upper-left corner talk to him with Fir. For my opinion if Fir is weak, Bartre is not worth getting (already Promoted characters are a no no for me) but if you are a ‘completist’ then do so. When you are ready to battle the boss, be careful since enemies will come out the base from time to time. To make your life easy, a powerful character (in my case dieck) in your party should battle the boss using an armorslayer for one hit kill.
Chapter 12
This is an easy chapter for me. First, be sure to include magic users to your party since they will be the only ones who could damage the boss, a light brand user is also considered.. The real boss would be a mamkute which is using a flame stone, but don’t fret since it does not attack. A thief of course is needed to get the treasures. Ray, A shaman, would be in the corner be sure to talk to him with Lugh or Chad. Cath will also appear at the top stairs so be sure that your thief is placed at the other group so Cath won’t get the treasures first. If you are able to talk to Cath with Roy she will at last join your party. But if it is a hassle to catch her then it is best to kill her instead just like i did. Reinforcements will appear after some time. A group of wyvern riders at the upper right corner and mercenaries+hero at the front. That’s just about it, just be sure that you step on the stairs at the area of the boss so reinforcements won’t appear.
Chapter 13
This chapter involves a lot of cavaliers/paladins/troubadors so don’t forget to equip yourself with a horseslayer. Milady, a wyvern rider, will join your party after some round. Percival on the other hand can be obtained by talking to him with Elphin. However, you have to do this fast since after the 8th round he will retreat. If it is too much of a hassle for you, better leave it behind since you have another chance to get Percival at chapter 15. Also after the 8th round reinforcements (horse users) will appear at the left. This will happen twice so finish them off first before going to the boss. The boss is a wyvern lord so a wyrmslayer or bow-users would do.
Chapter 14
Adjusting with the sandstorm is the challenge for this chapter. Include in your party magic-users and winged-users and avoid horse-users and armors since they will be completely useless. Sophia and Cecilia will join your party at the start of the chapter. Always limit your step since you’ll never know when a mamkute(3) or a wyvern lord(2) is behind the sandstorm. Use your thief wisely in exploring the map and move your characters every now and then even you don’t have to since you’ll never know when you’ll get an item below the sand (I got a silver blade, guiding ring, sleep and warp.. ^_^). One big hassle would be the axe-users (tons of them!) that will appear at the lower-left corner, use your sword-users to block them. As for the mamkutes, you have to kill them with one round or else somebody’s going to die. I had to surround one mamkute with 3-4 magic-users before I could kill it, that is tough. As for the boss, he will be using a light brand so I guess a lance user would do the job or a powerful hero.
