School's In, Oh Bummer! is the forty-ninth episode of the first season of Mighty Magiswords. It was released in the Cartoon Network website in December 8, 2017, it aired in Cartoon Network Phillippines and Southeast Asia and aired in the United States on April 22, 2018.
It turns out that Vambre and Prohyas didn't graduate the Adventure Academy after all and need to go back to school earn their diplomas.
- Prohyas Warrior
- Vambre Warrior
- Witchy Simone
- Cattus the One Blade
- Professor Cyrus
- Botticceli the Tortoise
- Professor MaBarnacle
- Fencing Magisword (debut)
- Little Blue Bomb Magisword
- Waffle Magisword
- Roundabout Magisword
- Tickle Magisword
Super Teamwork Combo
Roundabout Magisword + Tickle Magisword = Tickle Twist
- Grup gag: Same as "Unconventional Dolphinism".
- This episode marks the debut of Cattus' adult self in the TV series.
- This was Glori's second appearance since "Biggest Fan".
- Hoppus reveals tortoise are a natural enemy of a hare and impossible to outrun refers of Aesop's fable The Tortoise and a Hare.
- Professor Cyrus' line, "Magiswords uses strictly against rules!" and the Warriors' line, "If using a Magisword, we'll get the job done, why not use them!" are the exact dialouges or a callback reference of every Adventure Academy shorts.