The Object Transformation Spell is a Metamorphosis Magic spell that turns an innanimate object into any other one.
Barbara uses this spell in this episode to transforms Akko's flying broom into a badly made toy car.
Professor Ursula appears to use this spell to transform a blackboard eraser into a toy fish to try to hide the disappearance of Professor Pisces. However, the spell is not spoken.
Amanda attempts to use this spell on Louis Blackwell but she is unable to, having left her Leyline Router with Akko.