Medusa Stones are magical stones that unleash a spell that permenently freezes anyone or anything the magic zaps. The only way to undo the effects of a Medusa Stone is to take it off the wand that unleashed the magic and destroy it. Most people including most magic folk believe the stones are just a old story. Others like Grimtrix and Merlin know that they are real.
- The Medusa Stones and powers are based off the myth of the gorgon Medusa.