Is Diancastra in the Realms? I read on only one scroll I found here saying that while she is a giant goddess and is worshipped in the Realms, she is really just another alias of Mask. I am looking for some confirmation.
That doesn't immediately ring any SageBells, but the 2e On Hallowed Ground source doesn't mention anything specific about Diancastra worship being in the Realms. All that we do know is that she "Wanders," [as noted in her 'Home Plane' listing] so perhaps her faith has occasionally made itself a home on Toril.