Thor: Crown of Fools (2013 series) #1

Thor stands against his possessed friends: Sif, Hogun, Fandral, and Volstagg, their eyes glowing red, are prepared to slay their comrade. We then flash back to see how he came unto this pretty predicament…..

A swarm of birds attacks Asgard and the warriors drive them off; Sif immediately demands they follow the birds back to where they came from, but the men are reluctant. When Thor arrives, Sif shames the men into following her out into the wild. Thor explains that Loki’s excessive use of magical portals has weakened the barriers between the Nine Realms resulting in upheavals in nature. They fight off a pack of wolves, maddened in the same way as the birds. They discover a castle sitting in a crevasse and enter, discovering it is much larger on the inside than it would seem. As the heroes explore the fortress, they are drawn away one by one: Volstagg discovers a table set with a feast, Fandral finds an imprisoned maiden to rescue, and Hogun comes upon a dragon in need of slaying. Finally Sif enters the empty throne room of Odin and decides it is best that she become ruler of Asgard. Thor, alone, encounters Loki, who wishes to make peace with his brother after their long estrangement. It is when Loki proposes that they rule together as tyrants that Thor is able to break the spell giving each visitor what he most desires. His four companions, still enthralled, attack their leader and Thor has a hard time dodging the blows of these mighty warriors. Thor then spies upon a throne a crowned frost giant and engages him in battle; the Thunder God calls down lighting on his foe and knock off the Crown of Fools which breaks the spell for all of them, even the giant who was merely a lost traveler. Thor returns the giant to Jotunheim and the other warriors prevent Volstagg from rashly donning the Crown of Fools.