Item Rank: 0 It is a key to a mysterious iron door 1. enter the well in Holly Village (using rope ladder or ladder) 2. pull the lever on the left 3. cross the bridge 4. go through under the tunnel 5. set the mirrors so the sunlight could reach the ice, a door will be opened 6. enter the door, click the treasure chest 7. fight a troll 8. After fight, youll receive a 2 Exp Potion and Magnet Key (to open elin's lab door)