Porque Galbatorix usou magia para torná-lo maior
Great swaths of stars vanished as Shruikan wheeled across the sky, climbing higher and higher. Eragon tried to guess the dragon’s size from the outline of his shape, but the night was too dark and the distance too hard to determine. Whatever Shruikan’s exact proportions, he was frighteningly large. At only a century of age, he ought to have been smaller than he was, but Galbatorix seemed to have accelerated his growth, even as he had Thorn’s.
Inheritance - Fire in the Night
(grifo meu; sem número do capítulo)