The page makz linked, and this week reminded me of the incredibles with the robot made of metal that could only be destroyed with the same metal. The raikage is the only one who.could hurt himself xd ( hence the scar )
This is correct. The 3rd Raikage died while fightign 10,000 ninjas.
Dodai says that he "heard" that the Raikage didn't collapse for 3 days and nights. If the Raikage made it out and survived then he would have stated it as a fact instead of saying he "heard" it.