After unwittingly releasing a bound spirit from the tome that had been its prison, Trixie and Gilda find themselves thrown into the dark underworld of Equestria; where not everything that goes bump in the night is a myth.

Given a chance to make a difference in the world, the misfit duo set out to put down as many creatures as possible. Fortunately they're not alone... they've got one Nightmare of a guardian angel

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Alternate canon of Equestria's Crazies