Grogar

Grogar is a ram sorcerer and the underlying antagonist of the ninth and final season of Friendship is Magic. He was first mentioned in A Flurry of Emotions in a children's story read by Twilight Sparkle, but makes his first physical appearance in The Beginning of the End - Part 1.

Development
Grogar is based on the G1 villain from the series My Little Pony and Friends.

Depiction
Grogar is first mentioned in A Flurry of Emotions as the antagonist of a children's storybook called Gusty the Great, which Twilight Sparkle reads to a group of sick foals in Ponyville Hospital. In the story, Grogar battles a group of unicorn warriors led by Gusty the Great, but the outcome of their battle is not revealed.

He is revealed to be real when he appears in The Beginning of the End - Part 1, where he summons Chrysalis, Lord Tirek, Cozy Glow, and King Sombra to his underground lair. As the villains explain to Cozy Glow, who is unfamiliar with Grogar, he is a legendary tyrant who once declared himself emperor of the land that would become Equestria, creating countless monsters to wreak havoc until Gusty the Great took his mystical bell and banished him, leaving him weakened.

Having spent the past millennia recovering his strength and observing his fellow villains' defeats, Grogar proposes that they work together to overcome the Mane Six and conquer Equestria. When Sombra objects to this alliance, Grogar sends him to retake the Crystal Empire on his own, confident that he will be defeated, and threatening to send him back to the shadows from whence he came if he still refuses to submit.

In The Beginning of the End - Part 2, Grogar witnesses Sombra's demise at the Mane Six's hands from his crystal ball, which he shows to the other villains as a warning to secure their loyalty to him.

Personality
Unlike the other antagonists, Grogar has not faced the Mane Six directly. Instead, he acts as somewhat of a puppet master pulling the strings of the other villains in the shadows.