Darkness filled the land, then the sky bled a crimson shade. Tirek won the war, and Harmony was lost. Evil now rules the world.

But from the Ghastly Gorge, an even darker force emerges, carving Death and Destruction through its path, as it goes on a journey to liberate the fallen kingdom from its oppressors.

Very few dare to approach their mysterious savior, but any who do can only confirm two things they found out about the mysterious vigilante; the metal tag wrapped around his neck - the only form of "Identity" that anyone could catch, with the brand "138" on it, and the creature's eerie, glowing red eyes behind its gas mask, which showed no signs of life, nor even a glimmer of empathy for those who became victims of its brutal tactics...

What is this?
An alternate universe where Tirek defeated Twilight Sparkle, and a crossover with the famous "SCP" stories/articles, more notably, "SCP 138 - The Unkillable Man"