Magic Duel was Season 2, Episodes Take a Long Time!
Just in case you were curious about how long an episode actually takes to create from start to finish, Meghan McCarthy tossed this up on her Twitter a few hours ago. The verdict: an incredibly long time! Trixie's big comeback was in the planning stages way back when the fandom was just getting going.
It kind of puts things into perspective on other returning characters. I wonder who we will see next?