Really cool and unique monster. Looks great and laid out well but could use some minor TLC to increase clarity of writing. Only major note is that absent some more concrete tables or timelines regarding monster attacks/events, it's a bit open-ended, but a creative DM looking for a "players vs the DM" scenario will really enjoy that. Would also be nice to see some more discoverable exposition for the monster because I can see players missing out on a lot of the cool details. Great adventure!