Rare boss materials
ReferenceBuilt from the game’s data
Crafting materials that only bosses drop: what they are, which bosses drop them and the chance per kill.
Some crafting materials cannot be gathered or bought — they drop only from bosses, with their own roll on top of normal loot: as soon as the boss falls, on the first 2 runs of the repeat window, and in a group every member rolls for themselves. The Unstable Crystal drops from bosses of level 20+ dungeons. «On average» is per run of that location. Regular materials from dungeon enemies are in Dungeon materials.
Materials
Unstable Crystal
Drops from dungeon bosses from level 20. The charge for advanced bombs.
Drops from 106 bosses.
| Where it drops | Location type | Levels | Chance per kill | On average |
|---|---|---|---|---|
| The Blackwood Depths — Abyssal Guardian Helios | Dungeon | 20–27 | 14% | once per ~1 runs |
| The Blackwood Depths — Priestess Lornea | Dungeon | 20–27 | 14% | once per ~1 runs |
| The Blackwood Depths — Murkbelly | Dungeon | 20–27 | 14% | once per ~1 runs |
| The Blackwood Depths — Lord Kel'ris the Dark | Dungeon | 20–27 | 14% | once per ~1 runs |
| The Blackwood Depths — Primordial Morok | Dungeon | 20–27 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Targorr the Terrible | Dungeon | 22–28 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Kam Sunderstrike | Dungeon | 22–28 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Hamhock Bloodletter | Dungeon | 22–28 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Gromval the Igniter | Dungeon | 22–28 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Wild Hogmin the Butcher | Dungeon | 22–28 | 14% | once per ~1 runs |
| Lion's Stronghold Dungeons — Mad Basil Thred | Dungeon | 22–28 | 14% | once per ~1 runs |
| Gearnid - The Flooded Gnomegrad — Grimegear, Senior Overseer | Dungeon | 29–38 | 14% | once per ~1 runs |
| Gearnid - The Flooded Gnomegrad — Vix Rattlespine, Menagerie Master | Dungeon | 29–38 | 14% | once per ~1 runs |
| Gearnid - The Flooded Gnomegrad — Electron-Drill XR-9, Rogue Automaton | Dungeon | 29–38 | 14% | once per ~1 runs |
| Gearnid - The Flooded Gnomegrad — Chief Mechanist Crank Smokelove | Dungeon | 29–38 | 14% | once per ~1 runs |
| Gearnid - The Flooded Gnomegrad — High Technocrat Mechagar the Renegade | Dungeon | 29–38 | 14% | once per ~1 runs |
| Quillspike — The Thorny Barrow — Snoutgnasher Sharpspike | Dungeon | 25–35 | 14% | once per ~2 runs |
| Quillspike — The Thorny Barrow — Dark Shaman Rotgouge | Dungeon | 25–35 | 14% | once per ~2 runs |
| Quillspike — The Thorny Barrow — Dire Boar Crookedfang | Dungeon | 25–35 | 14% | once per ~2 runs |
| Quillspike — The Thorny Barrow — High Priestess of the Thorny Root — Thornmother Vyorna | Dungeon | 25–35 | 14% | once per ~2 runs |
| Scarlet Monastery — Graveyard and Library — Ashen Executioner Dogrin (Graveyard Wing) | Dungeon | 28–38 | 14% | once per ~2 runs |
| Scarlet Monastery — Graveyard and Library — Bone Reaper of the Misty Graveyard (Graveyard Wing) | Dungeon | 28–38 | 14% | once per ~2 runs |
| Scarlet Monastery — Graveyard and Library — Direfang - Scarlet Pet (Library Wing) | Dungeon | 28–38 | 14% | once per ~2 runs |
| Scarlet Monastery — Graveyard and Library — Master of Forbidden Knowledge - Archivist Morvent (Library Wing) | Dungeon | 28–38 | 14% | once per ~2 runs |
| Needledell — Barrow of the Dead — Rot-Totemist Mordrek | Dungeon | 37–46 | 14% | once per ~2 runs |
| Needledell — Barrow of the Dead — Bonegrinder the Smasher, Altar Guardian | Dungeon | 37–46 | 14% | once per ~2 runs |
| Needledell — Barrow of the Dead — Dark Priest of the Rotting Barrow — Necromancer Valgrim | Dungeon | 37–46 | 14% | once per ~2 runs |
| Needledell — Barrow of the Dead — Bone Colossus — Aman'Toth, Lord of the Barrow | Dungeon | 37–46 | 14% | once per ~2 runs |
| Crimson Sanctuary — Armory and Cathedral — Weaponsmith Horot | Dungeon | 34–45 | 14% | once per ~4 runs |
| Crimson Sanctuary — Armory and Cathedral — High Inquisitor Morayne | Dungeon | 34–45 | 14% | once per ~4 runs |
| Uldaman — Halls of the Creators — Revelosh the Excavator | Dungeon | 40–49 | 14% | once per ~4 runs |
| Uldaman — Halls of the Creators — Stone Keeper Archedus | Dungeon | 40–49 | 14% | once per ~4 runs |
| Zul'Karrak — Sanctum of Sands — Voodoo Priest Gahz'rul | Dungeon | 42–50 | 14% | once per ~4 runs |
| Zul'Karrak — Sanctum of Sands — Sezz'ziz, Avatar of Sand | Dungeon | 42–50 | 14% | once per ~4 runs |
| Maraudon — Tomb of the Forest Princess — Elemental Lord Geldrin | Dungeon | 40–49 | 14% | once per ~4 runs |
| Maraudon — Tomb of the Forest Princess — Princess Terala, the Fallen Goddess | Dungeon | 40–49 | 14% | once per ~4 runs |
| The Lost Temple of the Seven Stars — Atalarion, Ash-in-Stone | Dungeon | 50–56 | 14% | once per ~1 runs |
| The Lost Temple of the Seven Stars — Council of the Six Effigies | Dungeon | 50–56 | 14% | once per ~1 runs |
| The Lost Temple of the Seven Stars — Jammal'an the Prophet and Ogom the Wretched | Dungeon | 50–56 | 14% | once per ~1 runs |
| The Lost Temple of the Seven Stars — Scaleweaver and Hazzas Crimsonwing | Dungeon | 50–56 | 14% | once per ~1 runs |
| The Lost Temple of the Seven Stars — Spirit of Eranikus, Fallen Dreamkeeper | Dungeon | 50–56 | 14% | once per ~1 runs |
| The Lost Temple of the Seven Stars — Blood Avatar of the Memory Devourer | Dungeon | 50–56 | 14% | once per ~1 runs |
| Blackforge Depths — Rokkor, Shard of the Deep | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Bael'gar the Flame Maw | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Houndmaster Grebmar | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — High Interrogator Gerstahn | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Pyromancer Loregrain | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Ring of Law: Arena Champion | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Lord Incendius, the Living Brazier | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Fineous Darkvire, Lord Architect | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Warder Stilgiss and Verrigrath | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Ribbly Screwspigot, the Tipsy Smuggler | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Hurley Blackbreath, Brewery Thunderbrew | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Phalanx, Bronze Colossus | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Golem Lord Argelmach | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Magmus, Lava Gatekeeper of the Throne | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — General Angerforge, Warmaster of the Black Forge | Dungeon | 52–60 | 14% | once per ~1 runs |
| Blackforge Depths — Emperor Dagran Firebeard and Princess Moira | Dungeon | 52–60 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Razortooth, Lead Beastmaster | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Pack Leader Bloodfang | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Bonegnawer, the Carrion Feeder | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Chromatius, Dragonspawn | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Cindereater, Minion of Fire | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Drakiry, Keeper of the Clutch | Dungeon | 48–57 | 14% | once per ~1 runs |
| Lower Spire of Cindermount — Chieftain of the Black Clan, Garr Bloodfall | Dungeon | 48–57 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Pyromancer Lothar, Cinderweaver | Dungeon | 55–60 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Fury of Cindermount (Arena of Trials) | Dungeon | 55–60 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Underworld Beast, Clawed Terror | Dungeon | 55–60 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Rexar Darkword, Cult Warlock | Dungeon | 55–60 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Warlord Drakkisar, Cult Commander | Dungeon | 55–60 | 14% | once per ~1 runs |
| Upper Cindermount Spire — Dragon-Guardian of the Crimson Clutch, Flameborn | Dungeon | 55–60 | 14% | once per ~1 runs |
| The Blighted Sanctum (East Wing — Prison of the Ancients) — Drycrown the Ancient, Sleeping Protector | Dungeon | 36–46 | 14% | once per ~2 runs |
| The Blighted Sanctum (East Wing — Prison of the Ancients) — Rotbloom the Sporeling, Devourer of Roots | Dungeon | 36–46 | 14% | once per ~2 runs |
| The Blighted Sanctum (East Wing — Prison of the Ancients) — Winterfur, the Imprisoned Demon | Dungeon | 36–46 | 14% | once per ~2 runs |
| The Blighted Sanctum (East Wing — Prison of the Ancients) — Great Ancient Rootmane, Keeper of the Hall | Dungeon | 36–46 | 14% | once per ~2 runs |
| The Dire Sanctum (West Wing — Corrupted Library) — Shadowmor, the Ghostly Librarian | Dungeon | 39–49 | 14% | once per ~2 runs |
| The Dire Sanctum (West Wing — Corrupted Library) — Stone Gatekeeper Illyrium | Dungeon | 39–49 | 14% | once per ~2 runs |
| The Dire Sanctum (West Wing — Corrupted Library) — Spellslinger Ghost Ka'Driss | Dungeon | 39–49 | 14% | once per ~2 runs |
| The Dire Sanctum (West Wing — Corrupted Library) — Alzzin Fel-Face, Demon Keeper | Dungeon | 39–49 | 14% | once per ~2 runs |
| The Dire Chamber (Northern Wing — Ogre Arena) — Guz'lok the Arena Master | Dungeon | 44–54 | 14% | once per ~2 runs |
| The Dire Chamber (Northern Wing — Ogre Arena) — Bonesetter Hundar, Clan Shaman | Dungeon | 44–54 | 14% | once per ~2 runs |
| The Dire Chamber (Northern Wing — Ogre Arena) — Blind Seer Cho'ruk, Keeper of Disguises | Dungeon | 44–54 | 14% | once per ~2 runs |
| The Dire Chamber (Northern Wing — Ogre Arena) — King Gordok Thundermash, Lord of the Arena | Dungeon | 44–54 | 14% | once per ~2 runs |
| School of Dark Magic — Kirtonos the Herald | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Jandice of House Barov | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Bonegrinder | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Lord Alexei Barov | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Lady Illucia Barov | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Voronan the Executioner | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Marduk Bloodsteel and Vectus | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Doctor Theolen Bloodletter | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Lorekeeper Polkelt | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Ras Frostwhisper | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Instructor Malicia | Dungeon | 58–60 | 14% | once per ~1 runs |
| School of Dark Magic — Darkmaster Gandling | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Ezra the Gravedigger | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Baroness Anastari | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Nerub'enkan the Spider Lord | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Maleki the Pallid | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Magistrate Barthilas | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Ramstein the Gorger | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Baron Rivendare | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Timmy the Cruel | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Cannon Master Willy | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Archivist Galford | Dungeon | 58–60 | 14% | once per ~1 runs |
| Fallen Stratholme — Balnazzar the False Prophet | Dungeon | 58–60 | 14% | once per ~1 runs |
Arc Spark
A stable charge from dungeons. Powers epic gadgets. Drop only.
Drops from 39 bosses.
| Where it drops | Location type | Levels | Chance per kill | On average |
|---|---|---|---|---|
| The Lost Temple of the Seven Stars — Blood Avatar of the Memory Devourer | Dungeon | 50–56 | 8% | once per ~13 runs |
| Blackforge Depths — Emperor Dagran Firebeard and Princess Moira | Dungeon | 52–60 | 8% | once per ~13 runs |
| Upper Cindermount Spire — Dragon-Guardian of the Crimson Clutch, Flameborn | Dungeon | 55–60 | 8% | once per ~13 runs |
| School of Dark Magic — Darkmaster Gandling | Dungeon | 58–60 | 8% | once per ~13 runs |
| Fallen Stratholme — Baron Rivendare | Dungeon | 58–60 | 8% | once per ~6 runs |
| Fallen Stratholme — Balnazzar the False Prophet | Dungeon | 58–60 | 8% | once per ~6 runs |
| Molten Core — Lucifron, Flame Overseer | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Magmadar, Lava Beast | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Gehennas, Herald of Ash | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Garr, Lord of Embers | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Baron Geddon, Doom-Bringer | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Shazzrah, the Flame Whisperer | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Twins of the Caldera: Elder Magmus and Garm | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Golemagg, the Blackstone Smith | Raid | 60 | 8% | once per ~1 runs |
| Molten Core — Ragnamor, Lord of Fire | Raid | 60 | 8% | once per ~1 runs |
| Lair of the Black Queen — Onyxara, the Black Sovereign | Raid | 60 | 8% | once per ~13 runs |
| Crimsonwing Lair — The Rift, Voidwing | Raid | 60 | 8% | once per ~2 runs |
| Crimsonwing Lair — Wujin, Voice of Creeping Rot | Raid | 60 | 8% | once per ~2 runs |
| Crimsonwing Lair — Platedwing, Brood Commander | Raid | 60 | 8% | once per ~2 runs |
| Crimsonwing Lair — The Scaled Trio: Firewing, Froststing, and Shadowtail | Raid | 60 | 8% | once per ~2 runs |
| Crimsonwing Lair — Spellwing, Technodraconologist | Raid | 60 | 8% | once per ~2 runs |
| Crimsonwing Lair — Chromatus, Stitched of Five Bloods | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Dzingara, Blood Priestess | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Venassa, Voice of the Beast Gods | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Spider Beast God — Venornga | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Tiger Beast-God — Shar-Kashsh | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Eagle Beast-God — Arakshi | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Toad and Snake Beast-God — Swamp Gakhh | Raid | 60 | 8% | once per ~2 runs |
| The Lost City of Zul-Garud — Hakkari, the Blood God | Raid | 60 | 8% | once per ~2 runs |
| Ruins of An-Kevash — Kavramma, the Swarm Queen | Raid | 60 | 8% | once per ~4 runs |
| Ruins of An-Kevash — Burum, Ancient Guardian of the Sands | Raid | 60 | 8% | once per ~4 runs |
| Ruins of An-Kevash — Ossirian the Scaleless | Raid | 60 | 8% | once per ~4 runs |
| Temple of An-Kevash — Scarabor, the Beetle Tank | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — Void Guardian Trio | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — Fankriss, Progenitor of the Swarm | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — Vixna, the Mantis Priestess | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — The Twin Emperors: Vek'lor and Vek'thil | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — Uulak, Keeper of the Slumber | Raid | 60 | 8% | once per ~2 runs |
| Temple of An-Kevash — K'thulz, Avatar of Madness | Raid | 60 | 8% | once per ~2 runs |
Shard of the First Forge
A shard of the anvil on which Zarhold itself was forged. 12 are needed to forge the Hammer of the First Forge. Personal — obtained only in raids.
Drops from 18 bosses.
| Where it drops | Location type | Levels | Chance per kill | On average |
|---|---|---|---|---|
| Molten Core — Garr, Lord of Embers | Raid | 60 | 2% | once per ~10 runs |
| Molten Core — Golemagg, the Blackstone Smith | Raid | 60 | 3% | once per ~10 runs |
| Molten Core — Ragnamor, Lord of Fire | Raid | 60 | 5% | once per ~10 runs |
| Lair of the Black Queen — Onyxara, the Black Sovereign | Raid | 60 | 5% | once per ~20 runs |
| Crimsonwing Lair — Platedwing, Brood Commander | Raid | 60 | 2% | once per ~14 runs |
| Crimsonwing Lair — Chromatus, Stitched of Five Bloods | Raid | 60 | 5% | once per ~14 runs |
| The Lost City of Zul-Garud — Tiger Beast-God — Shar-Kashsh | Raid | 60 | 2% | once per ~14 runs |
| The Lost City of Zul-Garud — Hakkari, the Blood God | Raid | 60 | 5% | once per ~14 runs |
| Ruins of An-Kevash — Burum, Ancient Guardian of the Sands | Raid | 60 | 2% | once per ~14 runs |
| Ruins of An-Kevash — Ossirian the Scaleless | Raid | 60 | 5% | once per ~14 runs |
| Temple of An-Kevash — The Twin Emperors: Vek'lor and Vek'thil | Raid | 60 | 3% | once per ~13 runs |
| Temple of An-Kevash — K'thulz, Avatar of Madness | Raid | 60 | 5% | once per ~13 runs |
| Kazzagar, Voidlord — Kazzagar, Voidlord | World boss | 60 | 5% | once per ~20 runs |
| Azurex, Azure Warden of the Void — Azurex, Azure Warden | World boss | 60 | 5% | once per ~20 runs |
| Emerald Nightmares—The Four Fallen Dragons — Ysondre, Nightmare Prophetess | World boss | 60 | 3% | once per ~7 runs |
| Emerald Nightmares—The Four Fallen Dragons — Lethon, Devourer of Shadow-Souls | World boss | 60 | 3% | once per ~7 runs |
| Emerald Nightmares—The Four Fallen Dragons — Emeriss, Rot of the Emerald Woods | World boss | 60 | 3% | once per ~7 runs |
| Emerald Nightmares—The Four Fallen Dragons — Taerar, Shattered by Madness | World boss | 60 | 5% | once per ~7 runs |
Storm Heart
The pulsing heart of a storm, torn from a raid colossus's chest. 6 are needed to assemble the Eye of the Storm Core. Personal — cannot be sold or traded.
Drops from 6 bosses.
| Where it drops | Location type | Levels | Chance per kill | On average |
|---|---|---|---|---|
| Molten Core — Ragnamor, Lord of Fire | Raid | 60 | 3% | once per ~33 runs |
| Lair of the Black Queen — Onyxara, the Black Sovereign | Raid | 60 | 3% | once per ~33 runs |
| Crimsonwing Lair — Chromatus, Stitched of Five Bloods | Raid | 60 | 3% | once per ~33 runs |
| The Lost City of Zul-Garud — Hakkari, the Blood God | Raid | 60 | 3% | once per ~33 runs |
| Ruins of An-Kevash — Ossirian the Scaleless | Raid | 60 | 3% | once per ~33 runs |
| Temple of An-Kevash — K'thulz, Avatar of Madness | Raid | 60 | 3% | once per ~33 runs |
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