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.