Cocoon is a tactic/survival skill that when activated at the right time, negates damage around the player like a "cocoon". Its found behind one of the secret doors in undying shores.
Seismic is really good at long distance as a melee but it only really works if you have anything to have synergy with it or at least has extra root damage against mobs.
If you dont have any defense capabilities such as the cocoon or the force field shield during the acid rain then youre pretty much cooked with flawless.
