[X] Continue moving forward while acting to temporarily secure the rear in order to take pressure off that approach. -[X] Tyene will cast a Quickened Fickle Winds spell on everyone to protect from ranged attacks and the poison gas. She will then wait for Osyrx to use his breath weapon and the others to add their own impediments before casting a Wall of Sand spell to fill the corridor behind them with as much sand as possible. -[X] Osryx will unleash his breath weapon on the enemies who approach from the rear as soon as they come into view, taking care to also bath Qyburn, Polyos, and the Mold's Black Champion mount, in the cloud to heal any wounds they've suffered thus far. --[X] Polyos will shield Qyburn with his Black Champion mount's body as best he can during this, using a Necrotic Skull Bomb spell as a Swift Action to target the first group of Unsullied he sees then casting a Black Tentacles spell to fill the corridor in the wake of Osryx's breath weapon. --[X] Qyburn will cast a Black Sand spell coinciding with Osryx's breath weapon and overlaying Polyos' Black Tentacles spell. --[X] Once Tyene's Wall of Sand goes up, Qyburn and Osryx will then each use a Brilliant Barrier charm to temporarily seal off the approach behind them before directing most of their attention back to the corridor before them. Between the Wall of Sand and two separate Brilliant Barrier Walls of Force, that will be three barriers the Unsullied will have to contend with if they can make it past the Black Tentacles. -[X] Azema, Aradia, and both Mind Dragons will guard the front and guard against attacks from the Apostate Devil while the rear is secured, before the group continues moving forward at a faster pace.