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Blitzo warned everyone not to poke around in Stolas's Grimoire. The spells contained in those pages were for HIS eyes and HIS FUCKING eyes ONLY!

But Millie couldn't help herself. Her curiosity got the better of her.

As she flipped through the grimoire, eager to see what was offered, she stumbled across a muscle growth spell. "Ooh," she cooed. "This one looks interestin'."

But all magic comes with a cost, as both she and her beloved Moxxie would soon discover.

You can't just stick your dick where it doesn't belong and not expect to come out (wonderfully) bruised.

Tags: female muscle, muscle growth, breast expansion, transformation, monster girl, demon, magic, Helluva Boss, Moxxie, Millie, larger female, height increase, growth, femme domme, domination

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Story by Blue

Artwork by Rosita Amici

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