Bufo

The BUFO make an appearance in "Wizard". They bestow Finn and Jake with wizard cloaks (which Finn sees as a dress and tucks it into his shorts so he wouldn't be embarrassed). They trick Finn into achieving every level of wizardry until he became a master, then condemned him, telling him he had to make a vow, and Finn accepted without even knowing what vow he had to make. Finn, upon accepting the pledge, was led to a room where he would protect the wizard training facility from a meteor with the Old Wizards for the remainder of his life, using the powers to keep the meteor away. At the end of the episode, the BUFO begins to renounce all magic, but Finn interrupts, telling him it is unnecessary to quit his job, and that he only had to stop taking credit for ideas that weren't his. It is known that one of their names is Leonard. His name was revealed because he couldn't keep up with the talking by the other BUFO.

Appearance
The BUFO live inside of a frog and can only be seen when the frog's vocal-sac is fully expanded. The frog often portrays the other BUFO's emotions. The BUFO themselves are teal tadpoles with small purple wizard hats. There are nine of them, and they all try to speak in unison.

Trivia

 * There are nine BUFO for most of the episode, but ten of them are shown near the end.
 * Bufo is a latin word for toad.
 * Like the Witch from "Witches Garden", BUFO uses the "Razzamafu" spell to bring Jake and Finn closer and/or swap places.
 * When the temple was saved, BUFO said it was his plan all these 847 years, so that means BUFO is over 847 years old.