10. Iroh Breathes Fire - The Crossroads Of Destiny
When we first meet Zuko's uncle Iroh in the first season, we see him as this wise but kind of bumbling old man who's mostly just completely out of f*cks to give. Even when we learn his former moniker, the Dragon Of The West, we mostly assumed it to be metaphorical.
Then the season 2 finale comes along and laughs in our dumb faces.
In retrospect it's kind of obvious that fire benders can breathe fire. I mean, why WOULDN'T they be able to, right? And while we'd seen it happen here and there before, when Iroh lets loose his fire against Azula and the Dai Lee, it's clear why they called him a dragon.
It's not just a torrent of fire, it's one with range, control, and might far superior to other instances before and after this moment. Because this was the last we see of Iroh fighting until the series finale, we don't really get to see him breathe fire again, but this moment really helps prove that he EARNED the nickname of Dragon Of The West.