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Aggro lock is a term used when a character appears to repeat use of an ability or sequence of abilities that creates an aggro building loop. For tanks, this can be a good thing (assuming they can take the resulting damage or are being healed fast enough), but for DPS and especially healers, this can be a very bad thing.
A healer gets mobbed and starts to heal themselves, creating an aggro building loop. Lasts until the healer fails to heal in time and dies, or until finally a tank class (paladin, warrior, Death Knight or druid in bear form) manages to taunt mobs off or a DPS class builds massive threat via damage and builds even more aggro than the healer.
A paladin in the group can spare the healer's life for several seconds by placing on them. Remember, this aggro loss is temporary and the tank must do their best to build threat on all of the mobs before the spell wears off.
- If the healer is a priest, can be used and stops to heal, while a tank uses a taunt ability and starts building more aggro than the healer.
- If the healer is a druid, try to go to and start using or and just try and survive while being hit on.
- If the healer is a paladin, or can be used to lose all aggro temporarily.
- If the healer is a shaman, can be used a few times. Also, if is available, simply wait until your health is 30% and threat would also be reduced.
Note: If the healer uses an ability that reduces threat to save themselves, others aside from the tank in the group might end up targeted instead.