Even though Auros' body was made of energy, it still retained the collective mass of the city and its citizens and had to follow the laws of physics. Gravity pulled the Bringer of Unity down in the now-unstable soil, taking away his mobility.
'Dammit, there is not enough air element left to lift me.' He thought. 'If I don't dispel my protection, I'll be a sitting duck while those accursed Eldritches take their sweet time to cast whatever they want.'
Little did Auros know that Orulm heard every one of the lost city's thoughts the moment he formulated them. As soon as the elemental balance was restored, the Eldritch-Skinwalker hybrid conjured a series of useless arrays all around the golden giant.
Auros was still wondering what point barrier, life-sensing, and bridge-building arrays could possibly have when the Eldritch snapped his fingers and unleashed a Disarray spell.