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Thaddius is a boss found in the Curse of Naxxramas adventure. He is the fourth and final boss of the adventure's fourth wing, the Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreConstruct Quarter.

Hero Power[]

Normal and Heroic
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Auto-cast

Special cards[]

Thaddius full

Thaddius, full art

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Heroic mode only

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Decks[]

The below classes are listed purely for reference, and have no effect on the boss' use of the cards during the battle. Normal and Heroic

Class Card Quantity
Boss Supercharge 2
Priest Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreDark Cultist 2
Shaman Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreForked Lightning 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreLightning Bolt 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreLightning Storm 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreUnbound Elemental 2
Neutral Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreZombie Chow 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreAcidic Swamp Ooze 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreHaunted Creeper 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreNerubian Egg 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreShade of Naxxramas 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreStoneskin Gargoyle 2
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreSludge Belcher 4
Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreSpectral Knight 2

Tips[]

General tips

  • Use minions with auras that increase either Attack or both Attack and Health.
    • His hero power will swap the current Attack and Health of all minions, making the bonuses permanent.
    • The auras will then be reapplied, providing additional benefits. This process will repeat every turn.
  • 0-attack minions will become 0-health, and therefore die, when the boss' hero power activates.
    • For this reason, cards like Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreNerubian Egg is an excellent card for this fight.

Heroic

  • Thaddius summons Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreStalagg (boss card) and Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreFeugen (boss card) for free on his first turn.
    • These boss minions do not possess Deathrattles and will not summon a Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreThaddius minion upon death.
    • However, these minions' deaths will still count to trigger the player's Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreStalagg and Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreFeugen's Deathrattles, allowing for a Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreThaddius minion to be summoned as early as turn 5.
    • Early removal is key to deal with Stalagg and Feugen before they deal too much damage.

Decklists

Videos[]

Rewards[]

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Wing completion

As the final boss of the Construct Quarter, defeating Thaddius also unlocks the following rewards: Cargo Query Error: Error: Table Card not found. Cargo Query Error: Error: Table Card not found.

Dialogue[]

Thaddius WoW

Thaddius in World of Warcraft

Before match

Kel'Thuzad
It's alive!! But you won't be, for long.

Introduction

Thaddius
I must obey!

Emote Response

Thaddius
Kill!

Hero Power

Thaddius
You die now!

Death

Thaddius
Thank you...
Kel'Thuzad
Interloper! This is the final straw!

Lore[]

Thaddius promo

Thaddius in the Curse of Naxxramas promotional art

Thaddius is a raid boss in the Naxxramas raid.

In Curse of Naxxramas

The final hulking horror that stands within the Construct Quarter is Thaddius. Pieced together from the flesh of the innocent, this massive abomination dwells in one of Naxxramas’ experimental laboratories, flanked by two huge wights—Stalagg and Feugen. Powerful bolts of electricity arc through the laboratory, supercharging Thaddius and his wight minions.[1]

In World of Warcraft

In order to confront Thaddius in the Naxxramas raid, players had to first kill Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreFeugen and Ashes of OutlandBasicBlackrock MountainClassicHero SkinsNaxxramasDemon Hunter InitiateDescent of DragonsFestival of LegendsForged in the BarrensFractured in Alterac ValleyGalakrond's AwakeningGoblins vs GnomesLegacyLegacyJourney to Un'GoroKnights of the Frozen ThroneKobolds & CatacombsThe League of ExplorersMadness at the Darkmoon FaireMarch of the Lich KingMean Streets of GadgetzanMercenariesMurder at Castle NathriaOne Night in KarazhanPath of ArthasRastakhan's RumblePromoRise of ShadowsSaviors of UldumScholomance AcademyThe Boomsday ProjectThe Grand TournamentThe WitchwoodTITANSUnited in StormwindVoyage to the Sunken CityWhispers of the Old GodsCoreStalagg. If they were not killed within 5 seconds of each other they would resurrect each other with full health, forcing raids to down them almost simultaneously.

"Thaddius, built from the flesh of women and children, it is said that their souls are fused together - eternally bound within that foul prison of flesh."
- Commander Eligor Dawnbringer


References[]