Inside the walls of Tambelon Castle, Emperor Grogar, the Father of Monsters, makes his best attempt to raise his new creations...three young ones known as Discord, Cosmos, and Eris. Some distance away, at Midnight Castle, are the young princes Tirek and Scorpan. When the kids of Tambelon and Midnight meet, it marks the start of a new friendship. Trouble eventually comes, and the group finds themselves influenced by evil. When they discover ponies for the first time in the form of two young alicorn sisters, a more power-hungry side to Grogar becomes unraveled. Discord must fight to keep his friends from getting wrapped up in the resulting chaos...or else he risks losing them, and himself.
This story will elaborate upon these characters’ backstories that have been somewhat seen in various official works of FIM and will be kept as canon - or at least something that seems like it could work canonically - as possible.