Mystic Key

Opens magically sealed doors.
Found In Elven Castle
Getting the Mystic Key marks the end of the beginning of the game. You can now open the various locked doors you may have stumbled across, getting all sorts of nice Treasure including the Nitro Powder that eventually allows you to reach Melmond and begin the game's real quest: restoring light to the Crystals.
Compare Mystic Key to other Key Items
Treasures: Containing Mystic Key – 1 shown
Map
The specifics of where this treasure can be found
Notes
Elven Castle Given to you by the elven prince when you bring him Jolt Tonic
Crown Earth Rod

Related

KEY

Found In Castle of Elf
Getting the mystic KEY marks the end of the beginning of the game. You can now open the various locked doors you may have stumbled across, getting all sorts of nice Treasure including the TNT that eventually allows you to reach Melmond and begin the game's real quest: restoring light to the ORBs.