Thor Odinson had been a great Viking warrior and king. However, his arrogance, lead to Odin condemning him to never enter Valhalla, until he'd performed a series of tasks, to make up for his past.
In the 1980's, Thor's tomb was discovered by Dr. Donald Blake, who served as team doctor for a group of archaeologists. Blake picked up Thor's war hammer, which caused lightning to appear in the cave and Thor to appear.
Powers and Stats
Name: Thor Odinson
Origin: The Incredible Hulk (1978 TV series)
Classification: Human, Viking warrior and king
Speed: Normal Human (Shown to be rather slow, comparable to Hulk)
Lifting Strength: Superhuman
Striking Strength: Wall Class
Durability: Wall level
Stamina: Peak Human
Range: Standard melee range, extended melee range with Mjolnir
Standard Equipment: Mjolnir
Weaknesses: Was said to be arrogant