The Sil'dihn Subterrane

An extensive warren of tunnels and waterways stretches beneath the barren lands of Thanalan, but none come now to marvel at this remnant of fallen Sil'dih. Its memories lie undisturbed, festering silently in the dark and the damp. Yet not for much longer. You have come at the personal behest of Nanamo Ul Namo, and together will you throw open the gate to the desert nation's troubled past.

- In-game description

General Info

Name The Sil'dihn Subterrane
Level 90
Item Level 575 (Sync: 635)
Difficulty Normal
Party Size Flexible (1-4 people no role restrictions)
Unsync Not Allowed
Time Limit 90 Minutes
Duty Finder V&C Dungeon Finder
Tomestone rewards
15
Entrance Central Thanalan (X:16.8, Y:23.6)
Patch 6.25

Unlock

There's a pre-quest with no steps that serves to unlock the Variant and Criterion Dungeons, you will have to complete it once and any future content of this type will not require it again.
This quest is called An Odd Job which you an get from Osmon at Old Sharlayan (X:12, Y:13.4)

To unlock this Variant Dungeon you must complete the associated quests starting on A Key to The Past.


Survey Records

Each survey is gained by completing one of the twelve endings.

These are split by three paths that you must choose.

Left Path

Survey 1: Whom the Silkie Serves

  • At the room with two pedestals that has sacks laying around the room:
    • Pick the blue/green sack that is next to the door on the right side.
    • Then pick the yellow sack that is on the south-east corner (looking at the door) right on the corner of the room.
  • After going through the teleporter and killing the mobs, don't follow Nanamo to the gate, instead look to the left, behind a pile of rubble there's a hidden door, go to it and find the Ewer, use it then join Nanamo.

Survey 2: Pride and Acceptance

  • At the room with two pedestals that has sacks laying around the room:
    • Pick the blue/green sack that is next to the door on the right side.
    • Then pick the yellow sack that is on the south-east corner (looking at the door) right on the corner of the room.
  • After going through the teleporter and killing the mobs, follow Nanamo to the gate and ignore the door on the left.

Survey 3: A Spot in the Sunlight

  • At the room with two pedestals that has sacks laying around the room:
    • Pick any sacks that are not the correct choices (the one to the right of the door and the one on the south-east corner).
  • After going through the door, run through all the cotton puffs.

Survey 4: A Key Memory

  • At the room with two pedestals that has sacks laying around the room:
    • Pick any sacks that are not the correct choices (the one to the right of the door and the one on the south-east corner).
  • After going through the door, avoid all the cotton puffs.

Middle Path

Survey 8: Ul'dah and Sil'dih

  • Arrive at the room with the scales and levers:
    • Ignore the scales.
    • Activate the right lever.

Survey 9: Raising the Flag

  • Arrive at the room with the scales and levers:
    • Ignore the scales.
    • Activate the left lever.

Survey 10: My Mother's Eyes

  • Arrive at the room with the scales and levers:
    • Place the helmet on the left scale.
    • Place the fruit on the right scale.
  • Go to the statues and interact with the Statue of Nald.

Survey 11: The Thorne Legacy

  • Arrive at the room with the scales and levers:
    • Place the helmet on the left scale.
    • Place the fruit on the right scale.
  • Go to the statues and interact with the Statue of Thal.

Right Path

Survey 5: In Father's Stead

  • Defeat the first boss.
  • Arrive at the lifts:
    • Take the left lift.
  • Arrive at the mysterious door:
    • Select "The blessed spark" at the door.

Survey 6: Ul'dah's Sin to Bear

  • Defeat the first boss.
  • Arrive at the lifts:
    • Take the left lift.
  • Arrive at the mysterious door:
    • Select "The sacred fire" at the door.

Survey 7: To Learn More of Myrrh

  • Defeat the first boss.
  • Arrive at the lifts:
    • Take the right lift.
  • Arrive at the pack of drakes and kill them in order from largest to smallest:
    1. Drakefather
    2. Drakemother
    3. Drakebrother
    4. Drakesister
    5. Drakeling
  • After the wraiths, interact with the Myrrh Incense Burner on the right side of the room.
  • Interact directly with the sarcophagus at the end.

Survey 12: In Parchment We Trust

  • Defeat the first boss.
  • Arrive at the lifts:
    • Take the right lift.
  • Arrive at the pack of drakes and kill them in order from largest to smallest:
    1. Drakefather
    2. Drakemother
    3. Drakebrother
    4. Drakesister
    5. Drakeling
  • After the wraiths, interact with the Myrrh Incense Burner on the right side of the room.
  • Do not interact with the sarcophagus, instead, just select it and do these emotes in order:
    1. /bow
    2. /respect
    3. /vpose
    4. /kneel
  • Now you can interact with the sarcophagus.

Rewards

Personal Loot

Geryon the Steer

Name Quantity
Sil'dihn Potsherd 1

Silkie

Name Quantity
Sil'dihn Potsherd 2

Gladiator of Sil'dih

Name Quantity
Sil'dihn Potsherd 2
Gladiator of Sil'dih Card 1

Shadowcaster Zeless Gah

Name Quantity
Sil'dihn Potsherd 2
Shadowcaster Zeless Gah Card 1

Thorne Knight

Name Quantity
Sil'dihn Potsherd 2
Thorne Knight Card 1

Treasure Coffers

Name Quantity
Deceiver's Diamonds 1
Sewer Skink 1
Sponge Silkie 1
Sil'dihn Chair 1
Sil'dihn Side Table 1
Sabotender Parasol 1
Sil'dihn Kitchen Shelf 1

Mount

Completing all 12 paths unlocks the Silkie Whistle.

Sil'dihn Potsherd Rewards

Name Type Cost (Sil'dihn Potsherd)
Noir Hat Glamour 15
Noir Longcoat Glamour 27
Noir Leather Gloves Glamour 9
Noir Slacks Glamour 12
Noir Shoes Glamour 9
Sil'dihn Earring Glamour 3
Ballroom Etiquette - Ample Appreciation Emote 9

Achievements

Name Points Task
Squeaky Clean 5 Defeat the silkie in the Sil'dihn Subterrane variant dungeon.
Shadows' Past 5 Defeat Shadowcaster Zeless Gah in the Sil'dihn Subterrane variant dungeon.
Hollow Victory 5 Defeat the gladiator of Sil'dih in the Sil'dihn Subterrane variant dungeon.
Secrets of Sil'dih 5 Defeat the Thorne Knight in the Sil'dihn Subterrane variant dungeon.
Mapping the Realm: The Sil'dihn Subterrane 10 Discover every location within the Sil'dihn Subterrane variant dungeon.
Sil'dihn Subterrane 10 Unlock all survey records in the Sil'dihn Subterrane. Rewards the Silkie Whistle.

Data collected from
  • In-game support material
  • finalfantasy.fandom.com
  • ffxiv.consolegameswiki.com