Ragnaros the Firelord was once a servant of the Old Gods, but at present he rules over the heart of Blackrock Mountain and answers to no one -- save a mini-raid of level 70s. Knowing he is a fire elemental, it's no surprise that Ragnaros takes down his opponents with massive fire damage. In battle, Ragnaros will use the following skills:

• Wrath of Ragnaros: a melee-range knockback.
• Hammer of Ragnaros: selects a random target at range and knocks everyone in the vicinity back.
• Elemental Fire: A high-damage fire DoT that Ragnaros puts on whomever has aggro.
• Magma Blast: If no one is in melee range, Ragnaros will do a high-damage physical attack -- enough to wipe your standard player raid.

The Lich Lord Kel’Thuzad rules over the Plaguelands from his citadel Naxxramas. While in his floating fortress, the fight begins with the raid taking out several adds, we're just considering the bosses themselves, so we'll start by talking about what would normally be considered phase 2 of this encounter, when you first get to fight Kel'thuzad himself.

Kel'Thuzad does frost and shadow damage with:

• single-target and multi-target frostbolts,
• the ability to mind-control up to 4 targets,
• the ability to create a shadow fissure, causing massive shadow damage to anyone in its radius,
• a frost blast that immobilizes and damages its target (100% of its health),
• a mana detonation which causes causes mana users to explode, dealing damage to all of those around them.