Door Key

See:
 * Door Key (Assassin's Roost)
 * Door Key (Frozen Wight Lair 1)
 * Door Key (Frozen Wight Lair 2)
 * Door Key (Frozen Wight Lair 3)
 * Door Key (Frozen Wight Lair 4)
 * Door Key (Frozen Wight Lair 5)
 * Door Key (Frozen Wight Lair 6)
 * Door Key (Sclavus Santa's House)