Hall of Infinite Doors

"A key!" you answer.

The dwarf's face goes pale. "You... you cheated!"

"Am I right then? Can I cross?" you ask the dwarf.

"No, never!" the dwarf shouts, "You cheated! You must have!"

You're getting rather fed up with the dwarf. You rush forward, grab him, and haul him up by his shirt. He's even lighter than he looked.

"HEY!" he shouts.

You reach into his pocket and fish out the key.

"I was right! You see? I can cross now!" you say angrily. You examine the key more closely and notice a small design of a sword imbeded in the brass metal.

"Okay, fine!" the dwarf fumes, "You can cross. Just let me down, and give me back my key!"