Makrinaos (Patreon)

The island will be surrounded in a giant circular storm with whirlpools and a few tornados, named the Veiling Storms. It has a ton of underground areas and dialog/banners/clues which reveal the history of the island, so I won't spoil them all. It also has "???" number of secrets to discover on the map since there are a lot of them. (When you find them all, it displays the actual amount)