There are lasers in this fight ? >_> All I noticed is that the boss said something at like 1% HP left and then boom. I have not seen any other mechanics than the mummies...
in all honesty they are. They're a step higher in difficulty comparing to the others (on par with AK and Pharos in their time I'd say, maybe a bit more difficult), but they are still super easy to go through in 30 mins with 4/4 beginners.
