So I'm new to this whole thing so, here's the idea. Equestria is facing a giant new threat, Cosmos(the brother of Celestia and Luna) and the Alicorn Empire. The princesses and other Mane's are debating what to do, and wonder if they should try to infiltrate his empire's army. Spike however decides he is the best candidate seeing as he is unknown(save the Crystal Empire) so against Twilights knowledge and knowing she would not approve, he sneaks away and arrives in the heart of the empire pretend