MASTERS OF UNIVERSE TMNT TURTLES OF GRAYSKULL #4 COVER C PENIC

"THE MASTERMIND IS REVEALED! In the wild conclusion to this wicked series, we discover who has been tying the threads of the He-Man and Teenage Mutant Ninja Turtles universes together. He-Man and the Teenage Mutant Ninja Turtles find themselves facing-off against unthinkable mutations and chaos-but this time there's no reboots, no safety net, and no rules! Can our teenaged heroes prevail?   •  Script by the critically acclaimed and New York Times bestselling writer Tim Seeley.   •  Four issue series."