I'm still hitting a dead end without any choices at the bottom of the lake.
I've learned Archaic and witnessed Suzette. Last paragraph before no options is:
"There is a clatter of stones to your left, and then a flood of darkness streams toward you. It's more massive and terrifying than those first dark sprouts of Suzette's. Those were seedlings and this is a choking seaweed forest of darkness and death. Hooray."
Shame because this is really interesting.