The eerie greenish light, that seemed to come from nowhere more specific than
  "above" (it certainly wasn't a sun or a moon) cast deep green-black shadows in
  the openings of the crypts that lined the winding path. The Cleavermaws
  climbed a rough-hewn stone stairway past bare, stunted trees. They crossed a
  cracked courtyard surrounded by statues of hooded skull-faced angels bearing
  scythes. Wisps of fog wound round their ankles as they descended a hill
  covered in gravestones. A crow's call echoed through the empty streets but
  they couldn't see a crow.
  Mogrum felt like they were getting close now - the had seen a few navigation
  marks scratched into the stone work, and some of the avenues of mausoleums
  seemed to match the shape of the ones on the map fragments the Adm'rul had
  left behind.
  But the number of Nighthaunts stalking them had also increased. Time was
  running out. They needed to find the Adm'rul and get out of the Great
  Oubliette soon!
+++
  
  The Adventuring Party:
Kaptain Mogrum (Wurrgog Prophet)
    
- Bonesplitterz spell: Bone Krusha
    
- Bonesplitterz Command Trait: The Power of the Beast
    
- Loot: Scroll of Translocation (single use)
    
Lost Uzzog (Ship's Wardokk)
    
- Loot: Gravesand Ossuary (single use)
    
- Bonespitterz spell: Breath of Gorkamork
Mr Sludga
    (Savage Big Deck-Boss)
    
- Bonesplitterz Artefact of Power: Greatdrake Toof Sword
Mr Deadwood (Savage Big Deck-Boss)
  
  14th Exploration Roll - The Ambush 
  Dungeon Fight!
  8 Chainrasps (north)
  8 Chainrasps (south)
  4 Myrmourn Banshees (I added these as it was getting a bit too easy for the
    Cleavermaws!)
  
+++
  
  
  
  The orruk pirates heard the, now all too familiar, cackles and moans of the
  approaching gheists long before they saw them. Two large groups appeared out
  of the shadows on either side of them...
  
  
  Uzzog used his Weirddok powers to boost Mogrum's magic and then cast an Arcane
  Bolt of Waaagh! energy at the Chainrasps to the north.
  Mogrum tried to cast Bone Krusha but the magic fizzled out at his fingertips.
  The power for the spell was hungrily consumed by the Banshees!
  Sludga and Deadwood walked toward the Banshees swinging their weapons and then
  picked up speed, accelerating to a sprint as the charged the howling spirits.
  Deadwood attacked with his belaying pin and two of the Banshees dissolved into
  smoke. Not to be outdone, Sludga killed the other two with a few swings of his
  Greatdrake Toof Sword.
  The Chainrasps from the north moved on Kaptain Mogrum and Lost Uzzog. They
  grasped with spectral claws and jabbed with rusted weapons - Mogrum howled as
  he was wounded by their chill blades.
  The rest of the Chainrasps attacked and wounded Deadwood. Deadwood and Sludga
  replied by killing four Chainrasps each.
  Mogrum swung his staff and killed two Chainrasps and, in an
  uncharacteristically violent display, Uzzog smashed three - the last few
  dissolved into the twilight.
+++
  As the pirates moved further down the winding stone avenue Morgum found a
  third map fragment, pinned under a stone on top of a sarcophagus: they could
  almost decipher the location of the Adm'rul!
  15th Exploration Roll - The Stables
  Short Respite - Mogrum and Deadwood healed one wound each.
  The pirate orruks rested briefly in a mausoleum apparently built for a horse.
  Uzzog did his best to patch-up the Kaptain and his mate but they were not able
  to tarry long.
  
  16th Exploration Roll - The Prisoner
  Long Respite - All wounds healed.
  The Cleavermaws found a pirate orruk explorer, who called himself
  The Baron, in a locked cell and freed him. He was exceedingly pleased
  to meet his saviours but he seemed to be oblivious to his situation. He
  thought he was staying in a lovely country inn!
  He regaled them with unlikely tales of his adventures through the Mortal
  Realms. The crew listened with furrowed brows and growing incredulity and
  (behind his back) whispered their disbelief to one-another.
  17th Exploration Roll - The Last Fragment
  The Cleavermaws looked around the gloomy landscape of the Oubliette from atop
  a rocky, skull-caved rise, the Baron pointed out features that matched the
  Adm'ruls map. The crew chattered enthusiastically with renewed hope that their
  quest in this underworld was nearly over.
  Kaptain Mogrum looked hard at the scraps of parchment in the dim green light
  and frowned. The pieces didn't quite fit together, not matter how he
  rearranged them. There was a fragment missing and until they found it they
  were unlikely to be able to find the boss. He didn't want to bring the crews'
  mood down, they had been growing steadily more despondent over the last few
  weeks and finding the third map fragment and the Baron had combined to
  brighten them up. He knew from long experience that they worked a good deal
  harder when they had something to look forward to!
  He sighed and followed the group down the steps into a cluster of crumbling
  stone buildings and mausoleums. The Baron was pointing at something in the
  distance and telling a story about an encounter there. Mogrum couldn't hear
  the details but he knew it was unlikely to be true. The crew seemed to have
  started believing the Baron's tales though...