Sirens: The Deep Sea

From BoardGameGeek:

A full coop adventure and exploration board game for 1-4 players in the beautiful and dark deep sea. Explore and collect resources, construct buildings, build supply chains, develop your Sirens and fight against different cultures, monsters and bosses. Choose between scenarios and freemode. There are different options and random events that will change the course of your game each time you play. SIRENS has a variety of mechanics, but you don't need them for every scenario. You can also explore sunken ships, lost caves or go on "scale hunt" for the giant Na'Waakaai (old'being) to receive artifacts and legendary equipment. Hide from strong streams, whirlpools and earthquakes or use them to your advantage. Develop your sirens and build your own asymmetric ability tree with active and passive abilities by using life stream. Use magical spirit points to unlock powerful special abilities like the Sirens singing (a strong group ability) or unlock different bonus dice in your battle against different cultures