My Little Pony: Toxic Enemy

We join Turquoise Flare, a timid pegasus with a heart of gold. He was a very thoughtful, kind stallion who would help anypony. He and Janna, his wife, lived together in utmost harmony. One day, they were kidnapped by a bunch of criminals. Despite their strong bond and love, Janna chose to sacrifice Turquoise. He awoke in Hell, and he and Alabast plot to kill her.