Probably the most difficult boss fight is against Rashok. This boss must be killed as quickly as possible before he gets 100 energy. If he gains an energy level of 100, then the entire raid is over. In addition, you must constantly make sure that this energy is taken away from him again. If this doesn't happen in time, he destroys the raid with a single attack. In addition, Rashok still bounces to different players and leaves a puddle full of lava. This makes the whole boss even harder.