Thaddius (Classic)

Thaddius is the fourth and final boss of the abomination wing in Naxxramas. The theme of this boss is similar to that of Frankenstein's Monster, creating something akin to an abomination in that it is sewn together of human parts, but also part machinery.

The encounter begins with two wight mini-bosses Feugen and Stalagg, each staged on their own platform and tethered to an adjacent tesla coil. Feugen and Stalagg each have 499,650 health. If they are not killed within 5 seconds of each other the slain wight will resurrect with full health.

When both adds are down, players have 15 seconds to jump to the central platform before the tesla coils overload and activate Thaddius. Thaddius has ~6.657 million health.

Before the encounter, assign locations for positive and negatively charged people to stand. The most common assignment has negatively charged players to the left of Thaddius and positively charged players to the right.

• Preparation

Simply tank each sub-boss near where they start and DPS them down. Due to their mechanics, casters should fight Stalagg, while melee should fight Feugen. Mages and hunters can outrange Feugen's mana drain, so if the groups are too uneven then they can fill in for the missing spots. Note that these sub-bosses must be killed within five seconds of each other, or they will resurrect at full health(much like High Priest Thekal in Zul'Gurub).

• Phase 1

All players head to Thaddius' platform. There is roughly 20 seconds between killing both sub-bosses and getting charged. Thaddius will cast Polarity Shift roughly every 30 seconds. Players whose polarity changes have 5 seconds to run to the location for their new polarity. There is no need to avoid other players changing sides, and they should run straight to his new position, using the shortest path available (that is, running through Thaddius). It is important for the raid to stand in two groups because Thaddius must be killed within 5 minutes (to avoid the berserk) and the damage bonus from stacking players on each side is needed to kill him that quickly. Hunters especially need to make sure they remain within range to maximize the charge debuff stacks.

• Phase 2

Three important notes with this phase:

• After the initial Polarity Shift, further casts will only shift half the raid's charge, while the other half retains the same charge. This is random. It is crucial that all 40 players individually pay attention to their debuff, as they may be required to move to the other side.
• Players who miss the jump heading for Thaddius will not receive either charge, and will damage any nearby player upon successfully landing on the central platform. These players should stand on the central platform at a distance from the raid and wait until the next Polarity Shift, when they will receive a charge.
• Players lose their charge when they die, and will have neither charge should they be revived in combat. Accepting the rez will cause them to instantly be killed (in addition to them damaging nearby players). It is therefore never advisable to use a battle rez or soulstone during phase two.

Thaddius doesn't deal very much melee damage to an appropriately geared main tank, so only 3-4 tank healers are necessary. The other healers should focus on the rest of the raid, as Thaddius deals heavy nature damage to 15 players every 5-8 seconds.

• Healing

Thaddius hits for about 2k normal, 3.3k crushing. The damage multiplier the rest of the raid has can make holding threat for a warrior tank a little bit iffy. (Bear tank threat generation benefits from the damage multiplier, unlike warrior abilities, and is advantageous for this fight.)

• Tanking

In order to have a prayer of holding threat, the MT has to move with others of his charge, if he's unstacked by the debuff, he will find himself making frequent use of his Taunt button (Thaddius is tauntable).

Blizzard's release of the Anatomy of a Monster: Thaddius revealed some clues into the strategy of fighting this abomination.

At the start of the encounter, the players don't fight Thaddius himself; they battle two wights that are in the same room on two separate platforms. These platforms are not directly connected, so to fight them the raid has to split up and attack both wights at the same time. But it gets worse... the wights have the ability to snatch a player from one platform and pull him to the other, which is a way to split up the raid and divide their forces.

One central part of the whole Frankenstein myth is the way the monster was brought to life using lightning and electricity. Voltage is created when electric charges are separated; when the charges are brought together, the stored energy is released in an electrostatic discharge - a basic electric shock. When players finally go up against Thaddius, he will "polarize" the raid group by making half the raid positive and the other half negative. When positive and negative raid members get too close to each other... Well, let's just say that you want to get as far away from players with an opposite charge as possible, which further plays into the idea of separating the raid.

While Thaddius remains undefeated, the following screams are occasionally heard echoing throughout Naxxramas. The screams sound like those of a woman or child:

• Pleeease!
• Stop, please stop...
• Help me! Save me!
• Please, nooo!

These screams will cease after Thaddius is defeated.

• Intro
• yell

• Aggro
• yell
• yell
• yell

• Polarity Shift
• yell

• Killing a player
• yell

• Death
• yell

• Killed first
• yell

• Killed second
• yell

• Killed third
• yell

• Killed last
• yell

Defeating Thaddius rewards 100 reputation with the Argent Dawn.