The Grave Digger (Zeus) brings Kratos back from the underworld.
The Grave Digger was a mysterious man who was busy digging graves outside The Temple of the Oracle in Athens during its siege. He claimed it to be Kratos' grave, but soon became a helping hand when Kratos attempted to escape the Underworld. The Grave Digger, as it turns out, is actually the mortal guise of Zeus, The King of the Gods.