The Heimdallr Underground Passage is a passage under the streets of Heimdallr, connecting Mater Park with the basement of the Hotel - Der Himmel.
Trails of Cold Steel[]
Background[]
Class VII's Group A enters the passage on the first day of their field study to clear out a monster under the Hotel - Der Himmel. After doing so, they find an alternate exit to Mater Park, following Elliot's friends' music.
On the third day, the Imperial Liberation Front attacks the garden party at Mater Park where Princess Alfin Reise Arnor, Elise Schwarzer and Carl Regnitz are. Group A finds the governor injured as Michael Gideon leads the ILF with the princess and Elise as hostage out through another section of the passage. After defeating the monsters summoned by Gideon, Group A gives chase to the depths of the underground.
There, Gideon uses the Demonic Flute again to summon the skeleton of Zoro-Agruga, the ancient dragon that cursed the city during the Dark Ages. Group A is able to defeat the dragon's remains, with Rean destroying the Demonic Flute immediately afterwards. Group A demands the liberation of the hostages but the rest of the ILF's leaders appear, including the masked C.
The ILF agrees to release the hostages, but C challenges Rean, Laura and Fie by themselves to allow for their escape. C easily defeats the three at the same time using a double saber, after which Instructor Sara and Captain Claire arrive, forcing the ILF to detonate a bomb to collapse the catacomb and escape.
Maps[]
Enemies[]
- Dirty Rat
- Black Drome
- Ball Bat
- Ghoul Frog
- Giant Drome: Story
- Diving Ananta
- Cursed Sculpture: Story
- Zoro-Agruga: Story
- C: Story
Treasure Chests[]
| Key | Contents |
|---|---|
| 1 |  Luminous Glasses
|
| 2 |  Grand Press
|
| 3 |  Celestial Balm
|
| 4 | Monsters: Black Drome ×5, Dirty Rat ×5 |
 Genbu
| |
| 5 |        All Sepith ×250
|
| 6 | Curia Balm
|
| 7 | EP Charge III
|
| 8 | Teara Balm
|
| 9 |  Fortuna
|
| 10 | Celestial Balm EX
|
Quests[]
- Underground Passage Monster: Giant Drome can be found at the east end of Map 2.
- Pursuing the Terrorists: The Imperial Liberation Front flees through the passage after kidnapping Princess Alfin and Elise.
