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Thaddius, Healer Guide

Updated 9 months, 3 weeks ago for patch 1.13.6 and Season of Mastery by Preston. View the change log.

Thaddius Dungeon Journal ModelThis page covers a healer-focused strategy for Gluth in Naxxramas. While it's tailored for healers, other roles may also find the information useful. If you have any suggestions or feedback, you can leave a comment below or tweet @PrestonDvorak.

This guide has been updated and maintained based on my own experiences with the encounter, logs information, and Dungeon Journal information. I'll continue to update it as-needed.

General Mechanics and Abilities

During this encounter, players will fight against Thaddius' minions before engaging him directly.

Stage One - Stalagg and Feugen

This stage begins the encounter and ends when Stalagg and Feugen are killed.

  • Stalagg and Feugen are on the platforms to the left and right in the room. Stalagg on the left, Feugen on the right.
  • Shared Abilities
    • Magnetic Pull teleports the current tanks to the opposite platform, resetting threat.
    • Stay more than 15-yards away to avoid War Stomp.
    • Must be kept within range of their respective Tesla Coils at the back of each platform to prevent Chain Lightning from being cast, dealing critical damage to nearby players.
    • Must be killed within 5-seconds of each other to avoid being resurrected.
  • Stalagg
  • Feugen
    • Stay more than 30-yards away to avoid the mana drain effect from Static Field

Stage Two - Thaddius

This stage begins after Stalagg and Feugen are killed, and ends when Thaddius is killed.

Season of Mastery Differences

  • Currently, I'm not aware of any mechanical differences.
  • There are new quests offered by Archmage Tarsis Kir-Moldir just inside Naxxramas, and it was suggested that these could lead to surprises that "have a significant impact" inside and outside Naxxramas.

Resistance Levels

  • All players should use as much Nature Resistance as possible without sacrificing other stats.

Healing Notes

The notes below mostly pertain to progression difficulty, meaning if you out-gear the difficulty you're on or use extra healers they may not apply.

  • Keep players near full health so they can survive Chain Lightning.
  • Keep the tanks near full health before Polarity Shift so they can survive the possibility of all healers needing to move.

Debuffs to Track

  • There are no particular debuffs to track.


Healer DBM Settings for Thaddius Thumbnail
Healer DBM Settings for Thaddius


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Changelog - View the last ten changes. - +

August 05, 2022 - 8:08 pm (Healer) - Reviewed for Season of Mastery. Some minor clarifications and spell ID corrections were made.

August 05, 2022 - 8:08 pm (Healer) - Reviewed for Season of Mastery. Some minor clarifications and spell ID corrections were made.