Immortal Thor Vol.1: All Weather Turns To Storm by Al Ewing

Al Ewing works his IMMORTAL HULK magic on the God of Thunder! In Norse myths, they called him Thunderer. Vuer has he been named, and Hloriddi. The gods know him as Asgard's king, keeper of Mjolnir, hero of the tales. When injustice grips Earth and ancient powers bring down the sky, he fights for those who cannot - and when the tale is done, we will know what that cost him. For when an Elder God of the Utgard-Realm marks Thor for destruction, he will face his greatest trial. As Toranos hunts him across the stars, the Odinson finds himself marooned in a puzzle the size of a planet. What power would save him? This is the story of the immortal Thor - and the battle that will define him!

Collecting IMMORTAL THOR #1-5 and material from THOR ANNUAL (2023) #1.