Dimensional demons mixed in with Marvel

Waking up one morning in the Marvel universe, I've become a mischievous troublemaker in a higher-dimensional fifth dimension, bringing deadly jokes from dimensional demons to disrupt the real world. On Fifth Avenue, the Exorcist Dragon Clan and Hell Girl appear, Hulk descends, and the hunt by prehistoric humans from 200 million years ago begins! And that's not all. New York City welcomes the start of the Hogwarts school year, and Academy City also begins its enrollment. On Sardinia, the God-Slaying Demon King descends upon the land, and the City of the Dead brings a curse. The Sky Island arrives, entering the realm of gods alongside the Monarch Foundation! And all of this hinges on… the fifth dimension, a whisper echoing. "If Iron Man died on Christmas Eve, that would be a really funny joke!"