Mystical Chest

I know this is probably not the correct name for these boxes. They look like the Ark of the Covenant as portrayed in Indiana Jones. A large chest with 2 poles along the long sides for carrying, it glows with golden power. When click on it bestows an effect on all party members that are in range.

These drops are very rare.

Monsters
The following monsters are confirmed to drop these boxes:
 * in Zek
 * Lizardmen in Feerrott
 * Gnolls in Antonica

Effects

 * - Health regen
 * - Power regen
 * Increased Fitness - Increases AGI and STA by 28 for 15 minutes