Thor Omnibus by Cates & Klein

The prince is now a king. The realms are at peace. All of Asgard lies before Thor, God of Thunder — but the skies above the Realm Eternal are never clear for long. The Black Winter is coming — and to triumph over this new threat, Thor must be transformed in a most unexpected way! But something is wrong with Mjolnir!
What will it take to hold on to one of the most powerful weapons in the Multiverse? Plus: Thor revisits his old mortal persona, but he isn’t ready for the terrifying Donald Blake that awaits! Odin makes a surprising return! Thor battles Marvel heavyweights Venom, the Hulk and Doctor Doom! And what secret history does Thanos have with Bor, father of Odin?