[Fiverine]

Morgaine goes to the Library of Valstiir, looking for information about any gods, secret societies, cults or religious orders which use a three-headed hydra outlined in purple as their symbol. 

[Rainman]

Hydra was a dragon-like water serpent with fatally venomous breath, blood and fangs. Though its home is normally of the water, Hydra have been known to walk on land to get to a food source or to provide for its young. Hydra of this region have three heads than many some stories may tell, this doesn't make them less powerful or an opponent that should not be feared.

Roz'dha Cults come in many forms, one of such is a Monk Cult who have been known to wear Purple robes and are covered from head to toe in tattoos and runes. It is said they have a tattoo of a three Headed Hydra on the chest. This cult only appeared after the fall of the Necropolis and reports of there influence has been increasing.