Idea for a unique quest item bonus

[WhYdOyOuThInKtHaThApPeNeD]

A feature from the original Sega version would be nice to see. Could be added as a mod maybe...

Hero has a special map from start of game where the map face is concealed.

During the game pieces of the map are discovered, after a quest or defeated hero, each time a fragment of the map is revealed.

The map shows a part of some place potentially anywhere on the whole of the game. Each game the location is totally random.

If the hero goes to the exact location shown on the map and chooses to dig a special treasure of some sort is uncovered. The treasure never shows the light like other buried treasure shows. One has to find it exclusively by uncovering the map.

Digging randomly when there is no treasure light causes some consequence. Loss of money and game time or something.

Digging when there is a light shown has no consequence.

Or perhaps a special type of dig used exclusively for the special treasure that carries the consequence if used unsuccessfully.