This sound effect can be found on The Odyssey Collection: Expanded Sound Effects Library, which was made by Pro Sound Effects. It includes the 2nd roars of both Pro Sound Effects, Creature Vocal, Huge Roar, Crackly Growl 05 and 06, both roars of Pro Sound Effects, Creature Vocal, Huge Roar, Crackly Growl 07 and Pro Sound Effects, Dragon Creature, Giant Snake Like Hiss, Roars, Rattle, all of which can be found on The Odyssey Collection: Creatures Sound Effects Library.