ESO Quick Mechanics
Dungeon · 4 players · Bangkorai · Dragon Bones (2018)

Fang Lair

VetChallengingHMHard

Blackmarrow necromancer cult's lair. Five bosses, ending with the skeletal dragon Thurvokun and Orryn the Black. The final boss HM is among the hardest dungeon content.

01

Lizabet Charnis

Boss
☠ Wipe mechanic
  • Bone Colossus (one per wave, two in the last): dodge out of its expanding AoE or block and eat the knockdown.
  • Wraiths at the room edge: fast ice cloud that roots. Pull them to the center.

Add waves. Ignore Lizabet and kill the adds.

Tank
  • Hold the center. Chain or pull wraiths in, taunt the colossus.
DPS
  • AoE the small adds; save ults for the final wave.
Healer
    👁 Watch for
    • Flying skulls in random directions. Avoid them (damage + knockdown).
    0
    02

    Cadaverous Menagerie

    Boss
    ☠ Wipe mechanic
    • Senche fear-pounce: it fears a player then jumps on them. Interrupt the Senche immediately or that player dies in ~2s.
    • Exploding wolves: they run in and explode. Tank blocks them; they one-shot squishies.
    Tank
    • Hold bear, guar and senche together, far from where the wolves come in.
    • Block the bear's cone heavy.
    DPS
    • Kill order: Senche first, then guar, then bear. Animals sit down at 0% and revive later.
    Healer
      👁 Watch for
      • Undead animal statues come to life. Guar leaves poison pools.
      0
      03

      Caluurion

      Boss
      ☠ Wipe mechanic
      • Expanding crystal circles: find a gap and stand in it. Getting hit hits hard and stuns.
      • Red ring on you: don't overlap with groupmates.
      Tank
        DPS
        • When a totem lights up, the group goes there together and kills it. Kill exploding skeletons on the totem.
        Healer
          👁 Watch for
          • Lich on a central hill. Totems around the edge glow when active (poison, shock, roots, adds).
          ↯ Alternatives
          • High DPS can skip totems, but at 25% he goes immune until at least one totem is destroyed.
          0
          04

          Ulfnor and Sabina Cedus

          Boss
          ☠ Wipe mechanic
          • Chains: Sabina's ghost chains a player and drags them to Ulfnor. Kill the ghost before they arrive, or it's a one-shot.
          • Heavy: huge wind-up that one-shots an unblocked tank. Tank blocks; others dodge-roll.
          • Rapid small fire AoEs (channel): spread and weave. A few hits kill DPS/healers.
          Tank
          • Hold him still in the middle, not a corner (the low-health uppercut launches you).
          DPS
          • Burn the ghost on chains. Break free from fear fast.
          Healer
            👁 Watch for
            • Flaming sword: three fireballs fly out and bounce off walls. Stand in a gap.
            0
            05

            Thurvokun and Orryn the Black

            Final boss
            ☠ Wipe mechanic
            • Interrupt Orryn every time he teleports to a corner and fires skulls. A few hits kill a DPS/healer.
            • Ghost wall: Orryn sends a line of ghosts across the room. Group behind the gold ghost's protective wall. Touching ghosts kills.
            • Death Breath: after a fear, four gold circles appear. Each player grabs one before the breath lands or dies.
            • Poison pool: grows under the tank. Standing in it kills almost instantly.
            Tank
            • Keep Thurvokun centered. Walk the poison to controlled spots (opposite corners of the bone pile).
            • Block heavies. Shalks spawn under you after heavies; roll at the peak.
            DPS
            • Crystals (Orryn stands at one, around 85/75/65/55%): kill the crystal fast, plus adds and the Bone Colossus. Use ults.
            • Dodge the colossus heavy; don't block it.
            • Prioritize Shalks when up. Kill skeleton adds fast (they root).
            Healer
            • Call positions by crystal/gate. Bring a long-range interrupt (Crushing Shock) if needed.
            👁 Watch for
            • Orryn teleport: light blue aura, then he appears at a corner.
            • Tail whip: three triangular ice AoEs. Stand in the gaps or block.
            Hard mode · veteran only

            Activate: Read the incantation in Orryn's Notes before the fight (veteran only).

            • About double HP and more adds.
            • Crystals spawn a Bone Colossus; slow crystal kills add a second one.
            • Wraith Thralls spawn continuously after Orryn merges with the dragon. Avoid their hits.
            More detail

            At ~45% the ghost-wall phases begin. When the dragon 'dies', Orryn merges with it and it comes back at 50%. Then the ghost wall comes without a gold guard: find the gap and run through early.

            A Bone Colossus spawns at 40/30/20/10% after the merge. It's not a DPS race; Orryn is the priority, not the dragon.

            Not fully confirmed:
            • Ghost wall without a shield: MMOGames says HM removes the yellow shield (find the gap). Xynode says the gap version is just the post-merge phase.
            • Crystal thresholds (85/75/65/55%) are from Xynode only.
            • One search excerpt mentions a 'challenge banner' for this boss; UESP achievement text says Orryn's Notes.
            Sources · last checked 2026-11-09