Lunella Lafayette is one of the most brilliant minds in the Marvel-Verse - and she's only a fourth grader! Moon Girl has brawn to back up her brains, too - in the form of her big red T-Rex, Devil Dinosaur! Together, they're making a huge impression on the world - including bringing some holiday cheer to New York! Then, it's a rite of passage for any young hero to share a team-up with Spider-Man... but can Lunella, Devil and Spidey withstand the menace of the Pink Goblin? And as the War of the Realms rages around them, get ready for an epic dinosaur vs. Frost Giant battle! But just who is the smartest one there is - Moon Girl or Mister Fantastic? Marvel's main geniuses are about to be put to the test! Collecting: Moon Girl and Devil Dinosaur (2015) 37, 42-43, 46-47