Donny Cates' smash hit run on Thor continues! The gates to Valhalla are broken, and the souls of all who inhabit it have vanished!Now, on a quest for answers, Thor must face Doctor Doom in a battle of wits, morals and might!Doom's latest plot lies deep in Asgard's history. And nothing, not even time itself, will stop him from getting what he wants... except maybe for Thor, who must pursue him to protect reality itself!On a race through time, Thor and Doom find Thanos at the heart of it all - finally revealing the power struggle that brought Thor's grandfather Bor to all-out war with the Mad Titan!The ultimate weapon has been hidden away for millennia - but Doom will stop at nothing to control it!Plus: Thor teams up with fellow Avenger the Black Panther to repay a debt to a god!Collecting: THOR (2020) #31-34, TBD