The Order of Heroes was created by the Askr empire to help protect against the Emblian empire, a group who's been destroying portals and forcing heroes under the contract to do their evil deeds.

The heroes are pretty much taken out of the multiverse and summoned here to be used in the multiverse.

Each hero has their own special talents and skills, but they can be split up into different types.

Blue Heroes can be formed of Spear Users, Blue Mages, and Blue Manaketes (dragons). Blue Heroes are more effective against Red Heroes and weak to Green Heroes.

Red Heroes can be formed of Sword Users, Red Mages, and Red Manaketes. Red Heroes are more effective against Green Heroes and weak to Blue Heroes.

Green Heroes can be formed of Axe Users, Green Mages, and Green Manaketes. Green Heroes are more effective against Blue Heroes and weak to Blue Heroes.

Grey Heroes can be formed of Healers, Archers, and Knife Throwers. Grey Heroes mainly have range but are not typically effective or weak to other Heroes.

All of these Heroes then fall into different types of movement classes. Armor Classes have high defense, but slow movement. Infantry Classes can move normal walking distances and have normal defense. Calvary Classes ride horses, and can move rather far and fast, but they can't get through trees or large bushes. Flying Classes ride Pegasi/Wyverns/Dragons and can go as far Calvary but can go over trees and other obstacles, as well as fly over water and lava.

That's about the minimum amount of stuff you need to know.