The Mercury Crystal is a special sacred crystal, it has power over gold. It is held by Euterpe.
- The holder of this crystal can turn wood into gold
- The holder of this crystal gets a double flute. Any one who listens its music is blessed with good luck
- This crystal lets the holder to sing sacred hymns to bring joy and hope to the anyone who listens these songs
- This crystal lets the holder to make people and animals to sleep, bringing them gorgeous dreams