Barry Astrovik and the Magician's Stone

Synopsis
It's Barry’s eighteenth birthday, but no one is around to celebrate with him. He is then caught up in a magical adventure with the teenage Mistress of Magic, Belle, who is trying to stop the mad sorcerer Cornelius Agrippa from stealing a mystical red "Stone of Power" from a cavern underneath the school.

Trivia

 * The title and plot are inspired by Harry Potter and the Philosopher's Stone.
 * Padfoot the puppy is named after Sirius Black, whose Animagi nickname is Padfoot.
 * The Stone of Power is more like the Power Infinity Stone from Marvel.