Tirek and Grogar

In Dusty’s story, “New Animal Life”, Tirek is the ruler of Taurtarus (NAL version of Tartarus), a land in Equestria where all of its most evil beings imprisoningly resides. He once tried to rule all of Equestria a long time ago, but was defeated by Princess Celestia and Luna’s father, King Solar. In his defeat, he locked him up in a far land that he will hopefully never escape from. Despite his defeat, Tirek manage to control Taurtarus and its evil residents (such as Dicord’s sister, Disarray), making them attack Equestria to develop negative energy so that he may have enough power to escape (such as the Dark Beauty war, influencing Princess Luna to grow bitter and turn into Nightmare Moon, and such). Once he gain enough power, he escapes his prison, and was about to lead his evil army of Taurtarus to take over Equestria. However, he and his army was defeated by young yet greatly brave and strong magic-gifted earth pony stallion named Bravest Hero before his chance to strike, slaying him with the magical Sword of Harmony. Grogar was once the ruler of Tambelon until his kingdom has fallen by King Solar. To rebuild his kingdom, he secretly worked as an advisor for the former king of Horsebor until he strikes him down and takes over the throne. However, he was exposed by the combined forces of Dundo Loggins, the mane six, and Sword Hoof and his company, thus, been banished from society. Grogar then returns to get revenge by kidnapping Twilight (who’s an empty emotionless body at the time because her heart was safely inside Bravest Hero) to use her magic to merge his soul in Tirek’s body and control his dark powers. However, Bravest Hero defeated Grogar with the Sword of Harmony, magically enhanced by the Freedom Bell, and slayed him once and for all. Tirek is a tauren taur with beard-like mane in evil king-like armor.