Avatar the Last AirBender Book 3: Episode 13-16 - PATREON EXCLUSIVE (Patreon)

We realized too late our mistake of keep referring to this season as having only 18 episodes when really there was 21 haha, and yes its exactly as some of you guessed. its because we just saw 18 listed instead of reading the title which states that some of them were merged as one big long episode. 

So ya, do ignore anytime we say "oh man its crazy theres only 2 left" or something. :)