Keli'dan the Breaker

From wow.incgamers.com

General Info

Keli'dan the Breaker is the third boss of the Blood Furnace wing of Hellfire Citadel. He drops the key to the Shattered Halls wing.

Abilities

• Cone Shadow Bolts – A large cone shaped attack launching Shadow Bolts for 2000-3000 damage.
• Blastwave – A charged Blastwave dealing 4000-4500 damage.
• Corruption – Magic, DoT shadow damage

Strategy

The Keli'dan encounter is composed of two phases. First, Keli'dan's five warlock companions must be killed. They have little HP, and can generally be killed quickly using AoE. However, they will cast a two-minute duration magic debuff on random party members that increases Shadow damage taken by 1000. Most groups make sure to bring a Priest or Paladin for this encounter, however it is also possible to keep one Warlock crowd-controlled while waiting for the debuff to expire. The debuff also has a small cast time, so it can be interrupted if you catch it in time.

Once the last Warlock is dead, Keli'dan will yell and come after the party. He has a cone-shaped AoE Shadowbolt attack that hits for 2-3k, so it is generally wise to have the tank hold him facing away from the rest of the group. He will also occasionally go immune to all damage and stand in place, then after a couple seconds explode for 4-5k damage to anyone in close range. The tank (and any melee DPS) should run out when he yells to avoid this attack.