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Rumors of a Reaper/The Underground Chamber

From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.
The Underground Chamber

Cm fe16 6.png

Location

Monastery (Underground Chamber)

Boss(es)

Death Knight

The Underground Chamber (Japanese: 秘密の地下道の戦い Battle of the Secret Underground Path) is the main battle map of the sixth chapter in Fire Emblem: Three Houses. In this map, Byleth and their students discover a secret passage behind Jeritza's room, and use it to investigate the disappearance of Flayn.

Beginning log

The monastery is shocked to learn that Seteth's younger sister, Flayn, has gone missing. After an exhaustive search for clues, you finally come upon a lead...

Map data

Normal Hard Maddening

Chapter Data
Conditions
Unit Data
Victory: Defeat the Death Knight or rout all other enemies Player Partner Other Enemy Third
Defeat: Byleth dies*, the player's army is routed*, or 25 turns pass 10 {{{partner}}} {{{other}}} 26+3 {{{third}}}

Initial Levers pulled

Cm fe16 6.png

This map features warp tiles; by using the "Warp" command while standing on them, a unit will be transported to the endpoint, and will be left with a movement stat = their base movement − the movement it took to reach the warp tile. They are located as follows:

  • Column 16, row 21 ↔ column 18, row 21: Starting chamber to southeast chamber
  • Column 16, row 19 ↔ column 22, row 14: Southeast chamber to warp nexus
  • Column 8, row 13 ↔ column 16, row 8: Western hall to warp nexus (must be activated first)
  • Column 1, row 6 ↔ column 16, row 10: Northwest chamber to warp nexus (must be activated first)
  • Column 15, row 4 ↔ column 16, row 6: Northern hall to warp nexus (must be activated first)
  • Column 18, row 4 ↔ column 15, row 1: Warp nexus to second lever (must be activated first)
  • Column 20, row 4 ↔ column 22, row 1: Warp nexus to northern chest (must be activated first)
  • Column 22, row 4 ↔ column 20, row 19: Warp nexus to southern chest (must be activated first)

There are additionally two levers present on the map, which affect which floors are active. They are located as follows:

  • Column 19, row 8: Enables all inactive warp tiles
  • Column 10, row 2: Disables all stat-boosting terrain, turning them into floor tiles

Character data

Black Eagles Black Eagles Blue Lions Blue Lions Golden Deer Golden Deer

Characters
New Units

None

Returning Characters

Small portrait byleth m fe16.pngSmall portrait edelgard fe16.pngSmall portrait hubert fe16.pngSmall portrait ferdinand fe16.pngSmall portrait linhardt fe16.pngSmall portrait caspar fe16.pngSmall portrait bernadetta fe16.pngSmall portrait dorothea fe16.pngSmall portrait petra fe16.pngSmall portrait felix fe16.pngSmall portrait ashe fe16.pngSmall portrait sylvain fe16.pngSmall portrait mercedes fe16.pngSmall portrait annette fe16.pngSmall portrait ingrid fe16.pngSmall portrait lorenz fe16.pngSmall portrait raphael fe16.pngSmall portrait ignatz fe16.pngSmall portrait lysithea fe16.pngSmall portrait marianne fe16.pngSmall portrait leonie fe16.pngSmall portrait constance fe16.pngSmall portrait balthus fe16.pngSmall portrait hapi fe16.pngSmall portrait yuri fe16.pngSmall portrait anna fe16.pngSmall portrait shamir fe16.png

Note: Edelgard's inventory can be managed during this chapter, but she cannot be deployed due to the plot.

Item data

Items
Name Obtainment Method
Is ns01 key.png Door Key Dropped by enemy Soldier
Is ns01 potion.png Vulnerary Dropped by enemy Archer
Is ns01 key.png Door Key Dropped by enemy Mage
Is ns01 key.png Door Key Dropped by enemy Archer
Is ns01 key.png Door Key Dropped by enemy Archer
Is ns01 key.png Door Key Dropped by enemy Archer
Is ns01 key.png Chest Key Dropped by enemy Armored Knight
Is ns01 seal.png Dark Seal Dropped by the Death Knight
Is ns01 sword.png Levin Sword Open southern chest
Is ns01 ring.png March Ring Open northern chest
Is ns01 staff.png Magic Staff Steal from enemy Mage
Is ns01 staff.png Magic Staff Steal from enemy Priest
(Maddening only)

Enemy data

Normal Hard Maddening

Enemy Units
Name Class Lv # HP Str Mag Dex Spd Lck Def Res Cha Con Mov Inventory and Skills
Ma ns01 dark mage enemy.gif Mysterious Mage Dark Mage 11 2 29 5 12 8 9 8 6 10 7 - Miasma Δ
Miasma Δ Heartseeker
The northwest one stands on an avo floor.
Ma ns01 myrmidon enemy.gif Flame Emperor Soldier Myrmidon 11 2 27 8 7 6 12 4 5 4 9 4 Iron Sword
• The southern one begins moving if another enemy in the southeast chamber other than the male Archer is provoked.
• The northern one begins moving if the adjacent Mage is provoked.
Ma ns01 soldier enemy.gif Flame Emperor Soldier Soldier 11 1 27 8 7 8 10 4 5 4 9 4 Iron Lance Door KeyThis item is dropped upon this unit's defeat.
Begins moving if another enemy in the southeast chamber other than the male Archer is provoked.
Ma ns01 archer female enemy.gif Flame Emperor Soldier Archer 11 1 27 9 7 10 10 10 5 4 9 5 Iron Bow
Bowrange +1
Begins moving if another enemy in the southeast chamber other than the male Archer is provoked.
Ma ns01 soldier female enemy.gif Flame Emperor Soldier Soldier 11 1 27 8 7 8 10 4 5 4 9 4 Iron Lance
Begins moving if another enemy in the southeast chamber is provoked.
Ma ns01 mage female enemy.gif Flame Emperor Soldier Mage 11 1 27 7 11 8 10 8 5 9 9 4 Fire
Fire
--
Ma ns01 archer enemy.gif Flame Emperor Soldier Archer 11 1 27 9 7 10 10 10 5 4 9 5 Iron Bow VulneraryThis item is dropped upon this unit's defeat.
Bowrange +1
--
Ma ns01 mage enemy.gif Flame Emperor Soldier Mage 11 1 27 7 11 8 10 8 5 9 9 4 Fire Door KeyThis item is dropped upon this unit's defeat.
Fire
Begins moving if the adjacent Myrmidon is provoked.
Ma ns01 soldier enemy.gif Flame Emperor Soldier Soldier 11 1 27 8 7 8 10 4 5 4 9 4 Iron Lance
--
Ma ns01 archer enemy.gif Flame Emperor Soldier Archer 11 1 27 9 7 10 10 10 5 4 9 5 Iron Bow
Bowrange +1
--
Ma ns01 mage enemy.gif Flame Emperor Soldier Mage 11 1 27 7 11 8 10 8 5 9 9 4 Fire
Fire
--
Ma ns01 myrmidon enemy.gif Flame Emperor Soldier Myrmidon 11 1 27 8 7 6 12 4 5 4 9+1 4 Iron Sword
Reaper Infantry Lv 3: Onslaught
Begins moving if the northern Mage in the north chamber is provoked.
Ma ns01 mage enemy.gif Flame Emperor Soldier Mage 11 2 27 7 11 8 10 8 5 9 9+1 4 Fire
Fire
Reaper Infantry Lv 3: Onslaught
• The northern one begins moving if the Myrmidon in the north chamber is provoked.
• The southern one begins moving if the Archer in the north chamber is provoked.
Ma ns01 archer enemy.gif Flame Emperor Soldier Archer 11 1 27 9 7 10 10 10 5 4 9+1 5 Iron Bow Door KeyThis item is dropped upon this unit's defeat.
Bowrange +1
Reaper Infantry Lv 3: Onslaught
Begins moving if the southern Mage in the north chamber is provoked.
Ma ns01 dark mage enemy.gif Flame Emperor Soldier Dark Mage 11 2 27 7 12 8 10 8 5 8 8 4 Miasma Δ
Miasma Δ Heartseeker
Begins moving if any enemy in the central chamber other than the Death Knight is provoked.
Ma ns01 cavalier enemy.gif Flame Emperor Soldier Cavalier 11 1 29 11 7 9 9 8 8 4 9 7 Iron Lance
Canto
Begins moving if any enemy in the central chamber other than the Death Knight is provoked.
Ma ns01 mage enemy.gif Flame Emperor Soldier Mage 11 1 27 7 11 8 10 8 5 9 9 4 Fire Magic Staff
Fire
Begins moving if any enemy in the central chamber other than the Death Knight is provoked.
Ma ns01 armored knight enemy.gif Flame Emperor Soldier Armored Knight 11 1 33 9 7 7 5 8 16 3 9 4 Iron Axe
--
Ma ns01 archer enemy.gif Flame Emperor Soldier Archer 11 2 27 9 7 10 10 10 5 4 9 5 Iron Bow Door KeyThis item is dropped upon this unit's defeat.
Bowrange +1
--
Ma ns01 armored knight female enemy.gif Flame Emperor Soldier Armored Knight 11 1 33 9 7 7 5 8 16 3 9+1 4 Iron Axe Chest KeyThis item is dropped upon this unit's defeat.
Reaper Infantry Lv 3: Onslaught
--
Ma ns01 death knight enemy.gif Death Knight Death Knight 20 1 44 20 17 14 17 12 17 18 5 - Scythe of Sariel Dark SealThis item is dropped upon this unit's defeat.
Murderous Intent Canto Lancefaire Commander Counterattack Mastermind Poison Strike Lance Prowess Lv 2
Stands on wardwood.
Reinforcements
Name Class Lv # HP Str Mag Dex Spd Lck Def Res Cha Con Mov Inventory and Skills
Ma ns01 cavalier enemy.gif Flame Emperor Soldier Cavalier 11 1 29 11 6 10 5 8 9 6 9 7 Iron Lance
Canto
--
Ma ns01 cavalier female enemy.gif Flame Emperor Soldier Cavalier 11 1 29 11 7 9 9 8 8 4 9 7 Iron Lance
Canto
--
Ma ns01 archer enemy.gif Flame Emperor Soldier Archer 11 1 27 9 7 10 10 10 5 4 9 5 Iron Bow
Bowrange +1
--

Reinforcements

  • Upon entering the warp nexus (columns 16-22, rows 4-10), or upon opening the door to it
    • 2 Cavaliers in the upper corners of the warp nexus
    • 1 Archer in the middle of the warp nexus

Boss data

Main article: Death Knight

Normal Hard Maddening

Small portrait death knight fe16.png
Ma ns01 death knight enemy.gif Death Knight
Level 20
Movement -
Crest --
Stats
Max HP 44 Luck 12
Strength 20 Defense 17
Magic 17 Resistance 18
Dexterity 14 Charm 5
Speed 17
Inventory Abilities
Scythe of Sariel
Dark SealThis item is dropped upon this unit's defeat.
Murderous Intent
Canto
Lancefaire
Commander
Counterattack
Mastermind
Poison Strike
Lance Prowess Lv 2
Combat arts Spells Battalion
-- -- --
Skill Levels
Swords Lances Axes Bows Brawling Reason Faith Authority Heavy Armor Riding Flying Class mastery
B A C+ D C+ D E C E A E FE16ClassMasteryEmpty.png

Strategy

This section details unofficial strategies that may help with completion of the chapter. This may not work for everybody.

Once again, you have 25 turns to either flatten the Death Knight or wipe out everyone else. There's no good reason for Lysithea not to have B Reason and Dark Spikes Τ by this point if you're a Golden Deer. If you're a Black Eagle, Hubert picks up Dark Spikes Τ at A Reason if you've grinded him hard enough. As for the Blue Lions, Sylvain with the Lance of Ruin and Knightkneeler makes mincemeat out of the Death Knight. Note that there's only one Chest Key dropped on this map and two chests to go around, so if you don't have Ashe or a Thief you'll need to buy one from the marketplace.

You'll be splitting into two groups for this map. The west group has a fairly simple time luring in enemies and knocking them silly. Watch out for the three Archers lurking about, as they'll make mincemeat out of your Pegasus Knights. Once you've broken through the initial wave and claimed the Door Key, move north. The next room has a bunch of Avoid Floors; try to maneuver so that you get to use them and the other guys don't. The teleporter in the bottom right corner of the Avoid Floor room takes you to the teleportation nexus on the east side. You don't really want to go that way - you have to clean out the west side first. Once you're done here, continue through the gate and kill the Armored Knight. Note that the two doors in this hallway are linked so that when one is unlocked, so is the other. Given the cramped quarters the east group faces, it is likely that the west group will arrive at the central hall first. Once you've cleaned those guys out, have the west group wait up for the east group to link up with you.

The east group will be making their way through teleport pads to reach the nexus at the northeast corner of the map. Note that unlike the stairs you might remember from Fates maps such as Rainbow Sage and Possessed, using a teleport pad commits you to that action unless you're willing to blow a Divine Pulse charge to undo it. Enemy Archers will take potshots at you as you make your way to the second and third teleporters, but as long as you have a decent bowman of your own you should be fine. Shamir is especially good to have here, given that she can take potshots at the northern Archer with Curved Shot from complete safety. Opening the door to the teleportation nexus triggers three enemies waiting to have some mean words with you. There's a nice Cover tile that gives you 2 Defense and is only attackable from ordinary flooring by the two Cavaliers, so take advantage of that. Once you're finished with these goons, pull the lever to activate the warp tiles. The top right and top center ones take you to the chests, one of which drops the almighty March Ring (+1 Movement, anyone?), the top left one takes you to the lever that deactivates the special terrain tiles, and the left-top one takes you to the central hall which leads to the Death Knight. Clean house and regroup with your allies.

The last enemies are holed up in the Death Knight's chamber. Have a ranged unit lure in and pick off the two mages. Remember that killing that last Cavalier ends the map, so if you want to take out the Death Knight you have to do it now. You can always use a Gambit like Onslaught to pin that Cavalier in place, and the Death Knight doesn't move if you attack him this time, so he's a bit easier than in the Holy Mausoleum (unless you're on Maddening, in which case uh-oh). Take him out or kill the Cavalier to secure your victory. If you're a little bit short of OHKO thresholds, you can always chip him with Gambits.

Trivia

Flayn and Moncia's unconscious bodies
  • If the zoom view is used to observe the Death Knight's chamber, Flayn and Monica's unconscious bodies can be seen on the ground.

Etymology and other languages

Names, etymology and in other regions
Language Name Definition, etymology and notes
English

The Underground Chamber

--

Japanese

秘密の地下道の戦い

Battle of the Secret Underground Path

Spanish

El pasadizo secreto

The secret passageway

French

Sous le monastère

Underneath the monastery

German

Der unterirdische Raum

The underground Room

Italian

La stanza sotterranea

The underground room

Korean

비밀 지하도의 전투

Secret underpass battle

Simplified Chinese

秘密地道之战

Battle in the secret tunnel

Traditional Chinese

秘密地下道之戰

Battle in the secret underground road

Gallery


This section has been marked as a stub. Please help improve the page by adding information.


The Gautier Inheritance The Underground Chamber Battle of the Eagle and Lion (Black Eagles)
Battle of the Eagle and Lion (Blue Lions)
Battle of the Eagle and Lion (Golden Deer)
Fire Emblem: Three Houses
Playable characters Black Eagles BernadettaCasparDorotheaEdelgardFerdinandHubertLinhardtPetra
Blue Lions AnnetteAsheDedueDimitriFelixIngridMercedesSylvain
Golden Deer ClaudeHildaIgnatzLeonieLorenzLysitheaMarianneRaphael
Other AloisAnna*BylethCatherineCyrilFlaynGilbertHannemanJeritza*ManuelaSetethShamir
Ashen Wolves* BalthusConstanceHapiYuri
Non-playable characters Abysskeeper*Duke AegirDuke GerthFlecheGatekeeperGlennHolstIonius IXJeraltJudithLadislavaLambertLord ArundelMonicaNaderPatriciaRandolphRheaRodrigueRufusSeirosSitriSothisTomasTiana
Bosses AcheronAelfric*AloisBaron Ochs*BiasBlaiddydCasparCatherineCharonChilonClaudeCorneliaDaphnelDedueDeath KnightDimitriDominicEdelgardFelixFerdinandFlame EmperorFlaynFraldariusGautierGloucesterGonerilGwendalHubertIngridThe Immaculate OneThe ImmovableJudithKostasKronyaLadislavaLamineLinhardtLonatoLord ArundelLorenzMercedesMetodeyMiklanMysonNaderNemesisOdessePallardóPittacusRandolphRheaRieganRodrigueSetethShamirSolonSylvainThalesWandering BeastThe Wind Caller
Personal weapons and regalia Aegis ShieldAreadbharAsclepiusAthameAxe of UkonvasaraAymrBlutgangCaduceus StaffCirce StaffCrusherFailnaughtFetters of DromiFreikugelThe InexhaustibleLance of RuinLúinOchain ShieldRafail GemScythe of SarielSeiros ShieldSpear of AssalSword of BegaltaSword of MoraltaSword of SeirosSword of the CreatorTathlum BowThunderbrandThyrsusVajra-Mushti
Chapters Part I
White Clouds
Prologue: An Inevitable Encounter • 1: Three Houses • 2: Familiar Scenery • 3: Mutiny in the Mist • 4: The Goddess's Rite of Rebirth • 5: Tower of Black Winds • 6: Rumors of a Reaper • 7: Field of the Eagle and Lion • 8: The Flame in the Darkness • 9: The Cause of Sorrow • 10: Where the Goddess Dwells • 11: Throne of Knowledge • 12: To War Black Eagles, if Byleth sides against EdelgardBlue LionsGolden Deer / Outset of a Power Struggle Black Eagles, if Byleth sides with Edelgard
Part II Silver Snow
Silver Snow
13: Reunion at Dawn • 14: A King Without a Kingdom • 15: Valley of Torment • 16: The Rose-Colored River • 17: The Impregnable Fortress • 18: The Chaos of War • 19: Conclusion of the Crossing Roads • 20: The City Without Light • 21: Following a Dream
Azure Moon
Azure Moon
13: Reunion at Dawn • 14: The Delusional Prince • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The King's Triumphant Return • 19: The Golden Deer's Plea • 20: The Impregnable Fortress • 21: Our Chosen Paths • 22: Oath of the Dagger
Verdant Wind
Verdant Wind
13: Reunion at Dawn • 14: The Alliance Leader's Ambitions • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The Golden Scheme • 19: The Chaos of War • 20: Conclusion of the Crossing Roads • 21: The City Without Light • 22: Fódlan's New Dawn
Crimson Flower
Crimson Flower
13: Beyond Escape • 14: The Master Tactician • 15: Tempest of Swords and Shields • 16: Lady of Deceit • 17: Field of Revenge • 18: To the End of a Dream
Paralogues Paralogues Part I A Cursed Relic*An Ocean ViewBlack Market Scheme*Death TollDividing the World Black Eagles, if Byleth sides against EdelgardBlue LionsGolden DeerFalling Short of HeavenThe ForgottenLand of the Golden DeerOil and WaterRumored NuptialsThe Secret Merchant* Blue LionsGolden DeerSword and Shield of SeirosTales of the Red CanyonTrue ChivalryWar for the Weak Blue Lions
Part II Darkness Beneath the Earth Crimson FlowerDividing the World Silver SnowAzure MoonVerdant WindEternal Guardian Silver SnowAzure MoonVerdant WindThe Face Beneath Silver SnowAzure MoonVerdant WindForeign Land and SkyForgotten HeroInsurmountable Crimson FlowerLegend of the LakeRetribution Silver SnowAzure MoonVerdant WindThe Secret Merchant* Crimson FlowerThe Silver Maiden Azure MoonThe Sleeping Sand Legend Verdant WindWeathervanes of Fódlan Azure Moon
Cindered Shadows
(DLC side story)
Cindered Shadows
1: The Fourth House • 2: What Lies Beneath • 3: The Rite of Rising • 4: Danger in the Dark • 5: Betrayal • 6: Return to Me • 7: Wolf Pack
Locations FódlanAbyssAdrestiaFaerghusGarreg Mach MonasteryLeicesterAlmyraBrigidDagdaSreng
Groups, objects and concepts 10 ElitesAshen WolvesBlack EaglesBlue LionsChildren of the GoddessChurch of Seiros (Knights of Seiros) • Crests (Crest Stone) • Divine PulseGolden DeerHeroes' RelicsInsurrection of the SevenMonstersThose who slither in the darkTragedy of DuscurWar of Heroes
Related topics Music LibraryName chartPre-release informationUnused content