ISBN-13: 9781506744827, 978-1506744827. The only problem is. He-Man is missing in action. Collects Masters of the Universe/Teenage Mutant Ninja Turtles: Turtles of Grayskull #1 - #4. Masters of the Universe/Teenage Mutant Ninja Turtles: Turtles of Grayskull Author(s): Tim Seeley.
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