Alumna The Aluminum Horned Unicorn’s Story – In the Magical Elements of the Periodic Table Presented Alphabetically By The Metal Horn Unicorns, readers are briefly introduced to Alumna, the Aluminum Horned Unicorn. Alumna is one of the metal horn unicorns featured in the Journey To Osm collection of books by Sybrina Durant. Alumna, the rose-red aluminum horned unicorn is a member of the Metal Horn Unicorn tribe from Unimaise. She is the most learned of all the metal-horned unicorns. She constantly studies historical documents and she has made contact with an entity known as Numen, the Moon-Star Spirit, through a crystal ball. This communication with the Numen has given her the reputation of oracle of the tribe.