What can you do as a free member?

Member benefits illustration

Create your free account today and unlock all our premium features and tools to enhance your gaming experience.

Member benefits illustration

Create your free account today and save articles to your watchlist and get notified when they're updated with new information.

Member benefits illustration

Create your free account today and save your favorite games for quick access later, synced across all your devices.

Member benefits illustration

By creating a Game8 account and logging in, you'll receive instant notifications when someone replies to your posts.

Comment rating feature illustration

By creating a Game8 account and logging in, you can make use of convenient features in the comments section, such as rating and sorting comments.

Premium archive feature illustration

By creating a Game8 account and logging in, you can access Premium articles that are exclusively available to members.

Site Interface

Guest
Free Member
Article Watchlist
Game Bookmarks
Cross-device Sync
Light/Dark Theme Toggle
User Profiles
Direct Feedback
Comment Rating

Game Tools

Guest
Free Member
Interactive Map Access
Interactive Map Pins
Interactive Map Comments
Interactive Map Pins Cross-Device
Check List
Event Choice Checker
Deck Builder Cross-Device
Message Board Notification
Message Board Cross-Device
Build Planner
Stat Calculator
Diagnostic Tool
Weapon/Armor Wishlist

Want more information?Learn more

Fire Emblem: Three Houses (FE3H)

Chapter 17: The Impregnable Fortress (Church) Walkthrough

Add to Watchlist

This is the walkthrough for the seventeenth chapter of the Church of Seiros route in Fire Emblem: Three Houses (FETH, FE3H). Read on to find out the best way to use your time in the Monastery, how to win in battle, and which dialogue options to choose!

Previous Chapter Next Chapter
Chapter 16: The Rose-Colored River Chapter 18: The Chaos of War

Chapter 17 - The Impregnable Fortress

Opportunity from Casualties

An opportunity arrives from an otherwise unfortunate event. The party fully marches deeper into an unconquerable fortress for a chance to end the war.

Calendar

Date Events
5/3 Golden Fish
Choir Festival
5/10 Rare Monster Sighting
Head Chef Challenge
5/17 Fish of Mystery
5/21 Saint Macuil Day
5/24 Rare Monster Sighting
Spice Festival
5/31 [red]Chapter Mission: Attack Fort Merceus

Paralogues

Paralogue Required Units Available Until
Retribution Ferdinand and Lysithea 8/30

Free Time

Side Quests

Supply Run
Worried Warrior
Taking Care of Business

Chapter Objectives

Objectives
1 Go to the Knight's hall and accept the soldier's request.
2 Head to Seteth's location then accept the two quests.
3 Talk to Seteth again to give him the items needed for the quest “Supply Run”
4 Go to the Green House then pick up the quest item.
5 Return to the soldier then give him the herb.
6 Spend your activity points then end the exploration

Optional Supports

Dorothea Though actors die, the show goes on?
Petra Because it's like hunting?
Bernadetta it's going to be tough.
Ferdinand Don't leaders have feelings like everyone else?
Cyril You caould find our tagets quicker than anyone.
Sylvain You might be right.
Felix Don't get distracted.
Caspar Don't worry, I'll arrange for your funeral.

Chapter 17 Misson: The Impregnable Fortress

A tough battle awaits you with the Death Knight and this time, he's not an optional unit to defeat. For more information about the battle, see the link below.

Chapter 17: Taking Fort Merceus

Chapter 17 - After the Battle

There are several replies available from the dialogues but none provides any support boosts. Choose any reply you want and prepare yourself for the next chapter.

Fire Emblem: Three Houses - Related Links

Story Walkthrough.png
Part 2 - Silver Snow Walkthrough
Part 2 - Silver Snow
Chapter 13: Reunion at Dawn Chapter 14: A King Without a Kingdom Chapter 15: Valley of Torment
Chapter 16: The Rose-Colored River Chapter 17: The Impregnable Fortress Chapter 18: The Chaos of War
Chapter 19: Conclusion of the Crossing Roads Chapter 20: The City Without Light Chapter 21: Following a Dream

Author

    Please participate in our site
    improvement survey
    12/2025
    Would you assist in
    improving Game8's site?
    ×
    This survey will take about 1 minute.
    Your answers will help us to improve our website.
    We are listening to our users' valuable opinions and discussing how to act on them.
    The information collected through this survey will be used for the purpose of improving our services. In addition, the information will only be disclosed a part of a statistic in a format that will not allow identification of personal information.
    Begin Survey

    All rights reserved

    Guide Index