After conflicts with a non-bender equality group called the Denied, Aang learns about the ancient Air Nomad Avatar Sonam and her powerful staff capable of channeling spiritual energy and granting airbending.

Aang finds and awakens Tagah on a mountain, believing they share a bond as survivors. However, Tagah wants the staff to build an army for revenge and domination, not peace.

Now you guys have to stop Tagah and the Denied attacking Republic City.

after Tagah hits everyone with air bullets Katara lands in a pool of spirit water after being knocked down during the clash with Tagah, the sacred liquid supercharges her healing abilities. She uses it to revive herself. Then uses it to Revive everyone else