[Rygar]

Another thought to why the plane of fear has a druid ring... Perhaps it was once where Karana the Rainkeeper dwelled until Cazic Thule took the realm for himself. He slew the physical form of Karana and built the temple with the ring of fire to contain his essence from escaping into another physical manifestation. The spirit of karana is in constant suffering in this realm, which is why the rain manifests as blood.