Mythic Difficulty On Mythic difficulty players will also need to deal with a new mechanic: Volatile Foam. Volatile Foams are debuffs which come in three different forms: Flaming Volatile Foam, Briney Volatile Foam and Shadowy Volatile Foam.
These debuffs are applied to a random player and deal ticking damage to them. If they are dispelled, they will jump to the nearest player, however if they time out they will apply their magic type debuff to the player (the same one the player received from the breath). If a player has a Volatile Foam debuff time out on them, and it doesn't match the element type that they got from the breath, they will instantly die. Instead you want to dispel the debuffs next to a player with a matching elemental debuff type and then allow the Volatile Foam to time out on them.
These are the only real changes from heroic to mythic
Essentially you need to setup breath groups as normal and then also place a mark at range for each debuff type. Ranged people of that debuff type hang out by their color mark outside of breath time and people move to the proper color if they need a volatile foam dispel. The real challenge to the fight is the DPS check so pump out everything you can and execute the mechanics. Not all too complicated. We got this.