Thor

Thor's hamme was called Mjollnir. It had been made for Thor by the dwarfs Brokk and Eitri. It was on of the treasures of the gods. If Thor hit anything with it, that thing would be destroyed. If he threw the hammer at something, the hammer would never miss its target, and would always fly back through the air to return to his hand. He could shrink the hammer down and hide it inside his shirt, and he could make it grow again. It was a perfect hammer in all things except one: it was slightly too short in the handle, which meant that Thor had to swing it one-handed.