[zone=3456] The Arachnid Quarter The Plague Quarter Heigan the Unclean The Military Quarter The Four Horsemen The Construct Quarter Frostwyrm Lair Heigan the Unclean is the second boss of the Plague Quarter of [zone=3456]. says about him: Observe, Heigan the Unclean. The mastermind behind the plague cauldrons that turned the wilderness of Azeroth into the Plaguelands. It is said that Heigan has rigged the very walls and floors of Naxxramas itself with a vast array of traps, which he can trigger at will.

Overview Heigan the Unclean features the famous "Heigan dance", which is the only real danger of the fight. Throughout the encounter, Heigan will cause certain parts of the room to erupt in violent disease, hitting for a lot of damage. The pattern of which the remainder of the room - the "safe zone" - changes, is predictable, and is the key to winning the fight. Flash Animatation showing the Eruptions/Safe zones.As seen on the animation, the first Eruption will leave Zone 1 as safe. The second Eruption - Zone 2, and so on. During Phase 1 Eruptions will be separated by 8-10 seconds, giving the raid enough time to move. During Phase 2 they will happen a lot more frequently, giving the raid no more than 1 second time to rest between Eruptions, which makes healing through this Phase very hard if many people are taking damage. Phase 1 will last 90 seconds, and Phase 2 - 45, making a 135-second cycle. After each Phase 2, Heigan will re-enter Phase 1, and the Safe Zone will be 1 again. Abilities Phase 1: The Slow Dance (Spell #29310) - Every few seconds Heigan will debuff everybody in 20 yards range with a debuff that increases casting time by 300% for 10 seconds. (Spell #29998) - Throughout the fight Heigan will apply a disease to all players in 20 yards range, which decreases their maximum health by 50% and does 3,000 (25 Player: 4,500) Nature damage every 3 seconds, for 21 seconds. (Spell #29371) - Every ~8 seconds, Heigan will cause 75% of the room (platform not included) to erupt in poison, inflicting 6,650 to 7,350 Nature damage around the edges of the eruption, and more in the center. The "safe zone" will change in predictable pattern after each Eruption. Change Phase: Platform - After 90 seconds in Phase 1 Heigan will teleport to his platform and enter Phase 2. Phase 2: The Fast Dance (Spell #30122) - During all of Phase 2, Heigan will channel this spell, dealing 7,500 Nature damage every 1 second to all players on his platform. (Spell #29371) - During this Phase Eruptions will happen a lot faster - approximately every 2-3 seconds. The platform will no longer be safe due to the Plague Cloud. Change Phase: Dance Floor - After 45 seconds in Phase 2, Heigan will run back to the floor of the room, and re-enter Phase 1.