Amulet of Zopak

The amulet was create eons ago by Zopak a cleric of the Medusa Queen Hypthonia.  It  was used to imprison three legendary creatures: a  psychic vampire,  3 sister hags and a virtuoso lich.

Once captured the Queen broke the amulet into three pieces giving each to an imprisoned creature, cursing them to never be able to come with in  10 feet of each other.   Insuring that  they themselves could never recreate the amulet and free themselves.

Once all three items are fashioned together in a ritual that takes one hour to preform, the items become the Amulet of Zopak. The amulet can be used as a key to enter the Queen's Lair, once this is done the items fall to dust.

If worn as a item the Amulet confers an immunity to petrifaction.  And the user may speak draconian fluently.

Once per day using an action  the amulet will  transform the user's  visage into that of a medusa and they gain the following: 

Petrifying Gaze. When a creature that can see the Medusa's eyes starts its turn within 30 ft. of the medusa, the medusa can force it to make a DC 14 Constitution saving throw if the medusa isn't incapacitated and can see the creature. If the saving throw fails by 5 or more, the creature is instantly petrified. Otherwise, a creature that fails the save begins to turn to stone and is restrained. The restrained creature must repeat the saving throw at the end of its next turn, becoming petrified on a failure or ending the effect on a success. The petrification lasts until the creature is freed by the greater restoration spell or other magic. Unless surprised, a creature can avert its eyes to avoid the saving throw at the start of its turn. If the creature does so, it can't see the medusa until the start of its next turn, when it can avert its eyes again. If the creature looks at the medusa in the meantime, it must immediately make the save. If the medusa sees itself reflected on a polished surface within 30 ft. of it and in an area of bright light, the medusa is, due to its curse, affected by its own gaze. . This effect last for one minute.

When under this power the users charisma score is lowered to -3.

After using this power 5 times there is a cumulative 1% chance when using this power that the user will be permanently turned into a medusa.