Fighting Nemesis
Written by MSG Commander
When you load your saved data after achieving the Normal End, it puts you back in Despair Marsh, right before the battle with Nemesis.
When it asks if you're ready, select "More than ready!"
Go through the dialogue and fight Nemesis again.
After the dialogue, Nemesis asks Izayoi to erase her from existence.
Choose "Let's get to know each other instead."
After all the dialogue, you now need to open the four magic founts in order to gather the magic needed to reopen the gate to Niente.
The first one you need to open is in Asdivine, on Mount Ramah.
(Tip: If you've been saving your Exit Feathers and Flight Feathers, these next four locations would be the ideal time to use them.)