so let me get this straight in my head: Nightreign takes place in an AU where after the shattering, at some point in the resulting war a slewn knight named Heolstor rises from his grave and invokes The Night, which ravages everything and everyone until only "Limveld" is left?
HOWEVER, The Night is a cross-dimesional threat which is why by stopping the Nightlord, we also save the Elden Ring's Lands Between?