Fire Emblem: Three Houses - Chapter 21 – Following a Dream Story Walkthrough

A story walkthrough for Chapter 21 - Following a Dream in Fire Emblem: Three Houses, including a strategy guide for the mission battle The Final Battle

Fire Emblem: Three Houses - Walkthrough and Strategy Guide

Chapter 21: Following a Dream


BylethByleth Seteth

Character List

Walkthrough: Garreg Mach Monastery (Month of Verdant Rain Moon)

1 Listen to the dialogue.
2 Complete the mission battle.
3 Watch the cutscenes.
4 Listen to the dialogue.
5 Watch the rest of the cutscenes.

Mission Battle: The Final Battle

Battle Objectives

Victory Condition Defeat the enemy commander.
Defeat Condition All of your units fall in battle.

Player Units

Player Unit Battalion Used
Fire Emblem: Three Houses - Shamir IconShamir

Enemy Units

Enemy Unit Battalion Used
The Immaculate One
White Beasts
Frenzied Church Leader
Frenzied Church Soldier

Obtainable Items

Item Location


1) Stockpile on heals

We can’t stress this enough. Since you’ll be pit against The Immaculate One, you’ll need to bring multiple Concoctions. Don’t rely on your support units to do all the work because you might draw attacks onto them.

2) Take out nearby units

You start off in the middle of the map surrounded by threats. Assign one unit to snipe or nuke the enemy cavalry on the outer tile before they have a chance to attack.

3) Defeat the White Beasts

Move your snipers to take out the white beast on the bottom tile to remove its health stock. Finish it off with your flier and Byleth to clear the path. Regroup your team afterward.

4) Put your support unit in between his allies

Don’t leave spaces between your support and allies. Surround your healers with units that can soak up damage to keep them out of harm’s way. Even better if you can afford to have your support units sandwiched by your allies while they occupy forest tiles for additional boosts. Continue to move to the right while defeating the enemies.

5) Defeat The Immaculate One

Have Byleth lead the party and use a gambit to draw the boss’ attention. In later turns, have them whittle it down using the Sublime Creator Sword. Fliers also excel in dealing with the boss due to their innate ability to back away after closing in. Move your fliers to a spot near a support for some heals. Ideally, you’ll want to space out your units since the boss can make quick work of your team with its area of effect attacks. Moreover, keep checking the combat forecast while browsing through the weapon or combat art to find which of these deal the most damage while maintaining the most health. Other units can also assist in distracting the boss such as the Mortal Savant with Warding Blow. Heal Byleth in between turns to prevent their health from going down.

← Chapter 20: Conclusion of the Crossing Roads Other Story Routes →

Other Walkthroughs

Character, Classes, and Crests
Character Base Stats Character Base Skill Levels Class Base Stats
Character Stat Growth Rates Class Stat Growth Rates Skill Level Experience Bonuses
Tutoring Strengths Crests
Equipment and Items
Weapons Shields Accessories
Hero's Relic & Sacred Weapons Items Merchant Shop Items
Pagan Altar Items - -
Abilities, Arts, and Skills
Combat Arts Spells Class Combat Arts
Class Abilities Learned Combat Arts Learned Spells
Learned Authority Abilities Personal Abilities Gambits
Battles, Quests, and Locations
Monastery Map Abyss Map Mission Battles
Paralogue Battles Auxiliary Battles Quest Battles
Quests Terrains -
Enemy Units and Monsters
Enemy Units Monsters Maddening Enemy Unit Skills
Monster Attacks and Skills - -

Fire Emblem: Three Houses Recommended Article List

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