Normally "you and what army" is a rhetorical device. In this case, what does the hero expect to accomplish here? Force the MC to fight against human soldiers? That's not going to sway him to the human side. And any human soldiers that would survive that would only spread the story and poison any relationship the MC might develop with the humans. Well, maybe the MC can solve this in a non-violent way, like using that increase gravity magic spell or paralysis?