Toph snorted. "I thought hot air was advanced enough. It let us fly without sky bison, what more do you need, right?"

Though not her. Toph preferred her ground-level travel, even though it took more time than Appa.

"But to be honest, I think I'll hear about more advancements than I'll see."

Oh, come on, she could never pass up an opportunity to mess with people about her condition.