All's Fair in Love and War (A ROTG Fanfic)

It's been over half a century since the Guardians have defeated Pitch Black with the help of their newest recruit, Jack Frost. Suddenly, a temporary blackout with the globe and a message from MiM sends our beloved childhood protectors on a search for a spirit that they've rarely seen. The bad news is, Pitch is back, and he also wants said spirit. What's so special about this new addition to the plot of life, and is it really enough to stop a war?