Monster Arm / The Other Exchange Student
S1, E3: Star tries to fix Marco's arm with magic but accidentally turns it into a giant tentacle. The Diazes are visited by their former exchange student Gustav, and Star becomes jealous.

S1, E3: Star tries to fix Marco's arm with magic but accidentally turns it into a giant tentacle. The Diazes are visited by their former exchange student Gustav, and Star becomes jealous.