A random player will be debuffed and gain a huge circle around them. When this goes off a puddle will be left behind and erupt after a few seconds. Soak this to split the damage and quickly move out.
The boss will target the tank with a beam that will destroy any pillars in it's path. Do not be caught in this and be careful with how many pillars you shatter at once. The more pillars shattered the more raid wide damage will occur.
The boss will periodically cast this and cause a giant circle to appear on the ground. After it will erupt into smaller circles. Move out of the giant circle and avoid the smaller ones.