Mosstorm Fortress is one of the oldest active Delian Strongholds known in Tor'Dath, although it's identity seems to be unknown. An investigation form Team Green has shown it was recently destroyed.
Located deep in the Medbian Swamps this stronghold seems to have been built around a spiral runed covered structure that eminates a faint aura of raw mana that seems as if it's carved in some way rather than constructed.