Fluttershy gets pregnant with an adorable little bundle of joy. The bundle of joy then proceeds to tear a hole in the dimension and unleash hell itself.
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A crossover with Lovecraftian lore. Will contain multiple outer gods and some references to Lovecraft's stories.
Those of you who haven't read Lovecraft's stuff yet, I suggest going here. It's a bastion of information.
By the way, don't be fooled by the chapter titles - this is not a comedy (mostly).
Rated Teen for not-extremely-graphic gore. If necessary, I'll change it to mature.