Sun Stones

"The wizards have finally found a way to replicate the magic of the Ancient Sun Stones of Surya. Although the Sun Stones' true power remain a mystery, twice a year when solstice dragons are near, the Sun Stones light up. Make sure to look to the sky the actual day of the solstice; the Sun Stones briefly beam magic high into the heavens."

- Game Description

Possible References

 * The description mentions "Surya". This is likely a reference to the Hindu god of the sun.
 * The  design is likely based upon Stonehenge, a prehistoric monument in England.