He-Man and the Masters of the Universe (2013) #13

Before a new adventure begins, take a journey back 1,000 years to the reign of King Grayskull. Newly victorious over Hordak, it is a time of great victory and celebration for the King and Castle Grayskull stands in all of its regal glory. But an ominous prophecy weighs upon the crown, and sinister forces are already at work to see that it comes true.