So when the mana went away at the end of the 4th age, what did those creatures do that needed mana to survive, specifically the Pixies?
a) Leave this world for another metaplane? I don't think pixies are from a different plane, are they?
b) Find some mana hot-spots, and just tried to make it through the dry season. Even though their magic was very diminished, it was maybe still enough to repel the foolish humans wandering into their lairs? Which could make them the likely source of all the fairy folklore.
c) They're like insects, most/all of them died off at the end of the 4th age, but their eggs (or whatever) survived, and when the mana returned they hatched?
d) They hibernated somewhere?
e) They survived the 5th age as beautiful butterflies, and when the mana returned the awakened again?
Is there any answer about this somewhere?
Also would some or all pixies remember the 4th age, or were they all born after the Awakening?