Suggested by Sonic Leon has a lot of very impressive monsters. It’s not surprising since he is the head of his tribe and commands a lot of respect and prestige. It won’t be enough against a demon slayer like Gray though. Gray has mastered his ice abilities to the very limits of what they are capable of. There really isn’t a whole lot that Leon can hope to do against that. His monsters will all fall before Gray’s power and while some of them have enough offensive power to deal some damage, Gray is too fast to lose. Gray (Fairy Tail) wins.