Thaddius Encounter Guide: Strategy, Abilities, Loot

Thaddius is the fourth and final boss of The Construct Quarter that you will encounter in Naxxramas, and contains an infamous jump in addition to an equally infamous debuff. Make sure you have access to a Slow Fall or Levitate if you are nervous on this encounter.

• Do not leave your assigned platform when fighting Feugen or Stalagg. Only the tanks will be swapping positions.
• Ensure that Feugen and Stalagg die within 10 seconds of eachother to avoid resurrecting.
• Make sure you stand in the spot designated for players with a particular Charge debuff from Polarity Shift.

• Do not leave your assigned platform when fighting Feugen or Stalagg. Only the tanks will be swapping positions.
• Make sure you stand in the spot designated for players with a particular Charge debuff from Polarity Shift.

• Do not let Feugen or Stalagg leave their starting platforms, or they will cause the entire raid to take lethal amounts of Nature damage.
• Make sure you stand in the spot designated for players with a particular Charge debuff from Polarity Shift.

• Feugen
  • Static Field — Feugen will periodically use this ability, dealing a large amount of Nature damage to all players within 60 yards of him.
  • Magnetic Pull — Periodically, Feugen will forcibly drag the tank fighting Stalagg over to himself, while sending his own active tank over to Stalagg.
  • Resurrection — if Stalagg is not defeated within 10 seconds of Feugen's death, he will be resurrected.
• Stalagg
  • Power Surge — Stalagg will periodically enrage, drastically increasing his attack speed.
  • Magnetic Pull — Periodically, Stalagg will forcibly drag the tank fighting Feugen over to himself, while sending his own active tank over to Feugen.
  • Resurrection — if Feugen is not defeated within 10 seconds of Stalagg's death, he will be resurrected.
• Thaddius
  • Chain Lightning — A basic cast used by Thaddius while he is active, jumping to up to 8 players.
  • Polarity Shift — Thaddius's signature mechanic; he will apply either a Positive Charge or Negative Charge to all members of the raid. While debuffed, players standing next to others with the same charge will increase their damage dealt, while players of opposite charge will deal massive damage to eachother. Thaddius will also periodically swap the charge of players at random.

Begin this encounter by splitting your raid into two equal groups with an even distribution of tanks, healers, and DPS, as both Feugen and Stalagg need to be defeated within a short time period of each other to prevent their revival. While split, you will be fighting your designated miniboss and watching the health totals of both to make sure you are fighting at the same pace. Upon defeating these two, carefully jump from their platforms onto Thaddius's.

Once Thaddius has become active, he will quickly cast a Polarity Shift. At this time, your raid needs to quickly reach the designated stack points for Negative Charge and Positive Charge (generally labelled as "left" and "right"). If someone with the wrong charge is present...you will know when your raid quickly wipes from the resulting damage taken. Stay calm, and watch out for Thaddius shifting your polarity to the opposite debuff over the course of this part of the encounter.

Item	Type/Slot
Leggings of the Lost Conqueror	Tier 7 token (Legs)
Leggings of the Lost Protector	Tier 7 token (Legs)
Leggings of the Lost Vanquisher	Tier 7 token (Legs)
Torment of the Banished	One-Hand Sword/td>
Repelling Charge	Trinket
Cowl of Sheet Lightning	Cloth Helm
Arc-Scorched Helmet	Mail Helm
Blackened Legplates of Feugen	Plate Legs

Item	Type/Slot
Legplates of the Lost Conqueror	Tier 7 token (Legs)
Legplates of the Lost Protector	Tier 7 token (Legs)
Legplates of the Lost Vanquisher	Tier 7 token (Legs)
Spire of Sunset	Staff
Wraps of the Persecuted	Cloth Gloves
Cincture of Polarity	Cloth Belt
Cover of Silence	Leather Helm
Headpiece of Fungal Bloom	Leather Helm
Benefactor's Gauntlets	Mail Gloves
Pauldrons of the Abandoned	Mail Shoulders
Sabatons of Endurance	Plate Feet
Faceguard of the Succumbed	Plate Helm
Riveted Abomination Leggings	Plate Legs

Thaddius is just one of the 15 encounters present in the Naxxramas raid. If you would like to learn more about the others, or would like to see the loot tables of every boss at the same time, please see our other pages for the raid below.