(This is just me catching up on old avatar business i forgot to do it before lol)

After the crowning of firelord Zuko, aang returned to the earth kingdom to restore the earth kingdom back to the way it was exposed to. Aaang used all 4 elements in the same way he did with his fight with ozai but aang eyes flashed white instead of staying white. Aang raised his arms and draw water from the field, took fire from the higher levels fires outside their houses and earth from just outside of ba sing se just as he was joining teh 3 elements aang produced a air sphere around himself and bendend the other element around him in a circular motion. aang then released a stream of water go forwards and then some earth to create mud which he then bended to go into teh main gate and teh other walls that was either damaged or completely distroyed.me then released some fire from the circular disc around him to those places where teh mud was being held by teh avatars bendiung which heated the mud up and made it hard. hethen floated down back to teh floor in the fields and replaced allthe water back into teh field and spreaded it evenly around the whole area.

(ooc: just to let you know, because of the way the bendings work the only way you could use all four elements at the same time you would have to be in the avatar state)

(edited it lol)

(OOC: in he series his avatar is reactivevated so techinqly he would be able to use the avatar state at any time right, assuming that he remmbered the training for the guru.)