TNT

Found In Castle Coneria
Nerrick the Dwarf needs the TNT to blast open a channel to the outer seas, which allows you to continue your adventures. It can be found in Castle Coneria's Treasure vaults, and is in fact the only mystic KEY-locked item required to advance the plot.
Compare TNT to other Items
Treasures: Containing TNT – 1 shown
Map
The specifics of where this treasure can be found
Notes
Castle Coneria In the right chest of the locked western treasure room
CHIME HERB

Related

Gathering Clues (Optional)

The CROWN and the Mystic KEY
Page 2
Travel to the Dwarf Cave and the Northwest Castle to determine your next course of action.

Search for Locked Treasures

The CROWN and the Mystic KEY
Page 6
With the mystic KEY in hand, unlock the various Treasure rooms you've seen. Bring the TNT you find to the Dwarf Cave to open a canal to the outer world.

Nitro Powder

Powder packed with explosive power.
Found In Castle Cornelia
The dwarves need the Nitro Powder to blast open a channel to the outer seas, which allows you to continue your adventures. It can be found in Castle Cornelia's Treasure vaults, and is in fact the only Mystic Key-locked item required to advance the plot.