(Pic from Samaru163)
Part 1:From man to mare
Part 2:From man to mare: chaotic convergence
Part 3:From man to mare: an aching heart
Part 4:From man to mare: I love my mommy

Derry has gone through quite alot. He was turned into his doll, turned insane by Discord, manipulated by his Giga Sparkle into bearing a child, and having to deal with the pure essence of going through the birth process...and not getting any sleep for three months after. However, he has always doubted the authenticity of his Giga Sparkle's source of insanity. There's something suspicious about an "astral alignment" that just doesn't click in his mind.
As he thinks of this once more, he stands in front of his mirror. His reflection looks back, and this is where the most dangerous of his opponents will appear; himself.

Extra tags: Sad (because I'm very capable of mixing sad and comedy)