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Below the Seabed
File:Below the Seabed.png
Mission Type Story Mission
Charisma Cost 86
EXP 1420
Base Gold (3★ Gold) 4870 (7305)
Life 3
Initial Unit Points 10
Deployed Unit Limit 10
Number of Enemies 165
Special Conditions Allies' post-attack delay increased by 90 frames, stronger constant HP degeneration.
Prerequisite Corroded Wills
Unlocks Oceanic Trench Sanctuary
Keep the increased water pressure in mind as you repel the wriggling monsters under the Deep Sea!
<Deep Sea (Strong): Post-attack delay increased.>
<Constant HP degeneration after a period of time.>


Below the Seabed (より深い海の底へ) is the fifth mission in the Under the Sea chapter of Story Missions.


Enemy Unit
Sea Caterpillar Sprite.png
Sea Caterpillar ×117
Physical 7000 220 1200
MR 30
Initial: 50
1 UP
Regenerates at a rate of 1%/0.033s (30%/s). Regen is disabled when blocked.
Jellyfish Sprite.png
Jellyfish ×6
Ranged (100)
Physical 5000 400 200
MR 60
Initial: 50
Move: 61
Missile: 0
1 UP
Paralyzes target for 12 seconds after six hits.
Black Underwater Merman (Saw) Sprite.png
Black Underwater Merman (Saw) ×15
Ranged (60)
Physical 5250 750 150
MR 35
Initial: 46
Move: 41
Missile: 0
1 UP
Deep Sea Sharkman Sprite.png
Deep Sea Sharkman ×6
Physical 70000 2000 5000
MR 40
Initial: 46
2 UP
Infant Deep Sea Saratan Sprite.png
Infant Deep Sea Saratan ×19
Ranged (200)
Magic 20000 700 8000
MR 40
Initial: 26
Move: 181
Missile: 4
2 UP
Uses melee attack when blocked.

Ranged attack increases post-attack delay of units struck.

Deep Sea Saratan Sprite.png
Deep Sea Saratan ×2
Ranged (215)
Armored Merfolk
Splash 133.33
540000 1200 16000
MR 50
Initial: 46
Move: 201
Missile: 4
3 UP
Uses melee attack when blocked.
Armored Merfolk
Physical 9000 313
Initial: 46


  • Translations courtesy of Petite Soeur (Patreon) (edited)
Below the Seabed

Soma Icon.png Soma: "Uugh, isn't it getting kinda dark...?"

Obed Icon.png Obed: "It's a place deeper than the Seafloor City. Only a glimmer of light from the surface will reach here."

Duo Icon.png Duo: "... When I look at the wrecks of sunken ships, it reminds me this is the ocean's floor."

Obed Icon.png Obed: "From the perspective of drylanders, it must be a dead world, but from our perspective, the land itself is a water world. As they say, everything depends on your point of view."

Katie Icon.png Katie: "... Indeed. Now that we've joined hands, I want us to learn more about each other from now on."

Obed Icon.png Obed: "Hahah, I also concur. However, first, stopping Ghigael's scheme takes precedence."

Monica Icon.png Monica: "Uugh, but this 'water pressure' is something else... My body feels way heavier than the area around the Seafloor City..."

Sabrina Icon.png Sabrina: "H—mm, it looks like we'll be forced into a very hard battle if we fight in this state."

Obed Icon.png Obed: "——Oops, we don't have the luxury to be uttering complaints. This reverberation transmitting through the water... It looks like we'll be clashing with Ghigael's forces."

Rovinia Icon.png Rovinia: "... Hmm? O, over there? Those bugs are... Otherworldly bugs..."

Merman Icon.png Merman: "——Correct. By the hand of the Lord's messenger, Ghigael-sama, these drownling land bugs are suitable for the deep sea."

Obed Icon.png Obed: "You've created creatures from the dryland!? What... That is an act that encroaches on the province of the creator!"

Merman Icon.png Merman: "What? We're the servants of the Lord who has the qualifications to be the god of the sea. So it's natural we'll receive the Lord's mercy as well."

Liban Icon.png Liban: "Sea god...? Is there a sea demigod besides Krahlu-sama...?"

Merman Icon.png Merman: "You think you have the right to know that? No need to bother Ghigael-sama's hand; we shall turn you into fish food here."

Rovinia Icon.png Rovinia: "Prince, since they say those bugs are suited to the water pressure of the deep sea, they should be tougher than the bugs from the surface. Whatever you do, don't get careless!"

[Deep Sea Water Pressure (Strong)]

[Intervals after attack for allies greatly increased; after a unit is deployed, they receive DoT damage for set intervals; these effects cannot be countered or alleviated with Feng Shui or Geomancy.]

[Otherworldly Bugs (Deep Sea-type) regenerate HP and will lose this effect when they blocked.]


Merman Icon.png Merman: "... Kuh, this is the deep sea. Why are drownling landers this strong... Hurry, we must report to Ghigael-sama...!"

Obed Icon.png Obed: "Prince-dono, the Ocean Trench Temple——we'll soon be upon the steps of the seal domain of Bahamut. I fear a fierce battle awaits us."

Reanbell Icon.png Reanbell: "... You're telling us now? Was there a battle that wasn't fierce among the fights the Kingdom faced until now?"

Obed Icon.png Obed: "So it wasn't mistaken when they say you're the army that conquered the inner body of Leviathan... Yosh, in that case, let's proceed onward."

Anna NPC Icon 2.png Anna: "Prince, if they break Bahamut's seal, it's predicted there'll be a great many casualties among both the deep sea and the surface. Let's protect the seal without fail!"


Wilfred Icon.png
Wilfred Lv. 40
Russell Icon.png
Russell Lv. 40
Junior Deep Sea Soldier Icon.png
Junior Deep Sea Soldier Lv. 40
Liban Icon.png
Number of Drops 1 1 4
EXP 265 265 265+30

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