Thor Vol 3 #1

Adrift in the Void, Thor reflects upon the many adventures he has had, notably those that involve his fellow Asgardians, Sif and the Warriors Three. Suddenly, Thor feels a strong summoning and is surprised to discover that it comes from Doctor Donald Blake, the late physician who was once host to the power and essence of Thor. Don tells him that he has more experience with understanding the afterlife than Thor does, and encourages him to return to the world of the living. He tells him that the f