A Space Opera of all things.
About an ancient alien race leaving humanity the tools to destroy a vicious alien race that is bent on destroying or enslaving all races of the universe one by one. Eons ago they ascended to a higher plain of pure thought. They saw humans as the last hope to save the universe.
You read as one after another is recruited into a force that with stop the unstoppable. We are unique in the universe the most adaptable, imaginative, easily taught, most determined, and diverse race.
They left us a fleet of ships, tens of thousands of suits of armor. Axes. Swords. Shields. Guns. Dragons. Griffins.
The enemy is nearly indestructible cutting them deep and wide is the only way to hurt them. They heal before you eyes. Their exoskeleton is armor. They were born to rule over all life.