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Gates of Ahn'Qiraj · Encounter 4 · 16:00

Ossirian the Unscarred

Encounter 4 of 5 in Gates of Ahn'Qiraj. Base health 24,750.

Azeroth Survivors v0.141.0 · Checked 2026-11-05

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Boss guide

How to beat Ossirian the Unscarred

Gates of Ahn'Qiraj · Encounter 4 · 16:00 · 24,750 base HP

When it arrives

Arrives at 16:00 as encounter 4 of 5 in Gates of Ahn'Qiraj.

Boss yell“Sands of the desert, rise and block out the sun!”

Previous encounter · 12:00 ← Princess Huhuran Next encounter · 20:00 C'Thun →

Attack timeline

5 recorded actions for this boss, in data order. Values are stored base client parameters.

  1. 1 Shield

    In-game text“Ossirian the Unscarred is shielded!”

    The boss gains a shield; the game announces "the boss is shielded!", "the boss calls on the Light to shield him!" or "Obsidian shards shield the boss!". The text does not say whether it absorbs damage or must be broken.

    Interval
    30 s

    How to handle: Keep damage up while the shield is announced and save burst for the window after it drops. The 0.1 s combo gap means the shield can land almost with the next mechanic.

  2. 2 Crystals

    Weakening crystals

    In-game text“Stand in a crystal to weaken Ossirian the Unscarred!”

    Crystals weaken the boss: the game says "Stand in a crystal to weaken the boss!" and then "the boss is weakened!". The data records two crystals every 15 s.

    Interval
    15 s

    How to handle: Step into a crystal when it appears and stay there until the boss is weakened; do not destroy the crystals. Take the closer one and return to damage once the debuff lands.

  3. 3 Circle around the boss

    Boss-centered circle

    In-game text“Lava wells up around Ossirian the Unscarred!”

    A hazard centred on the boss: the game warns "Lava wells up around the boss!" or "the boss pounds the ground!", then the marked area around it resolves. The data adds a 1.3 s warning and a 7-12 s cycle.

    Interval
    8 s
    Warning
    1.3 s

    How to handle: When the warning appears, step out of the area around the boss and wait for the hit before re-entering melee. A 7 s cycle leaves little time to finish a long cast.

  4. 4 Moving orbs

    One or two orbs travel across the arena every 12-14 s. The data gives the count and cadence but not their speed, path, or whether they track a player.

    Interval
    14 s

    How to handle: Watch the orbs' line and step perpendicular to it rather than running along the path. With two orbs, keep both on the same side so you always have an exit.

    Inferred from game data — not yet verified in game

  5. 5 Summon

    Add wave

    In-game text“Minions, to me!”

    The boss calls in a wave of adds; the game announces it with "Minions, to me!" or "A pack hunts you!". The data records 4-14 adds on a 10-16 s cycle.

    Interval
    12 s

    How to handle: Clear the pack before the next summon lands; at 14 adds a single-target build falls behind. Keep moving so the new adds do not surround you while you finish the last wave.

Phase changes

No health phases recorded for this boss.

How to fight it

Up to three actions, taken from the timing data: shortest warning, shortest interval, then the first new phase action.

  1. 1
    Shortest warning (1.3 s) Circle around the boss

    When the warning appears, step out of the area around the boss and wait for the hit before re-entering melee. A 7 s cycle leaves little time to finish a long cast.

Suggested build focus

Build tips recorded for this boss's attack types.

  • Burst builds lose the most to a shield; steady damage is less punished.
  • Area damage can break both at once; a single-target build should plan a swap every 15 s.
  • Melee builds need a movement plan here; ranged builds can keep uptime from outside the circle.
  • Movement speed helps more than a stationary damage boost; the orbs punish standing in a rotation. Inferred from game data — not yet verified in game
Paladin First clear S Druid First clear S Hunter First clear A

Based on the site's first-clear class ranking, not zone-specific testing.

Attacks and hazards

Shield

shield
Base interval
30 s

Break or bypass the shield before returning all damage to the boss.

Crystals

weakening crystals
Base interval
15 s
Count
2

Destroy the crystals before returning to the boss.

Circle around the boss

boss circle
Base interval
8 s
Warning time
1.3 s

Leave the marked area around the boss before it resolves.

Moving orbs

moving orbs
Base interval
14 s
Count
2

Track the orb path and stay out of its travel lane.

Summon

summon adds
Base interval
12 s
Summons
12

Clear the adds without letting them close the exit.

Mechanics can scale with difficulty, party size and later patches. The values above are stored base client parameters, not measured cast times.

Class loot

Other encounters in Gates of Ahn'Qiraj

04:00 · Encounter 1 Kurinnaxx 08:00 · Encounter 2 General Rajaxx 12:00 · Encounter 3 Princess Huhuran 20:00 · Final boss C'Thun