Collects Thor (2007) #601-614, Thor Annual (2009) #1, Thor Giant-Size Finale #1, Siege: Loki #1 And New Mutants (2009) #11. A seismic era for Asgard as the hammer passes from one legendary writer to another! Cataclysmic events have rocked Thor's world! So what will his friends do to help him? Meanwhile, Loki has woven his intricate scheming throughout every level of Thor's existence. From Asgard to Oklahoma, from Latveria to Hell, the Trickster has involved the likes of Doctor Doom, Hela, Norman Osborn and even Mephisto to meet his sinister goals. But when his plans spiral out of control - culminating in the Siege of Asgard and the return of an ancient evil so terrible it means certain disaster to even speak its name - it's up to Thor and his fellow Asgardians to save the day! But who, if anyone, will save Loki? And what part does Dani Moonstar of the New Mutants have to play?