The Ritual Stone's purpose.

[Mavis Celru]

Outside of the Coven's Villa, deep within the Fens, lies the Ritual Stone's of the ancient witches of the Fens. The four large stone pillars reside in the depths waiting and yearning to be used again.

These stones are for any witches and family members to perform special or advanced magical rituals.  

[Chieftain Keane]

*Stumbling upon the magic circle, the spirit walker is drawn to the intense, and concentrated power of this unique place. Staring around him in awe as bright lights begin to glow and flutter around him*
I think this place will be perfect for us.