Forgotten Depths - A Unique Dungeon Adventure

About Forgotten Depths, from BoardGameGeek:

Forgotten Depths is a co-op dungeon adventure game that combines unique tile laying and hand management mechanics to deliver a substantial experience of exploration and combat. The goal of the game is to get to the bottom of the dungeon and destroy the powerful entity that resides there. To make it, you'll need to improve your heroes by finding items and buying new abilities with experience points you gain by exploring. Those experience points are in scarce supply and you'll need to balance between saving them for abilities and spending them on the healing and keys you'll also need. The game is played by alternating between two main activities, Exploring and Encountering. You'll start by Exploring, creating the layout of the level as you play, and discovering Ecology Elements. You choose when and where to Encounter the Elements you discover, and you go back to Exploring after each Encounter. The game features: 3 Dungeon Level ‘Ecologies,' each with their own unique Monsters, Features, and hard to find Legendary Locations Character progression. Find and equip items, and purchase abilities and spells with your hard won XP. 30 unique Monsters. Never face the same Monster twice in a playthrough. 30 unique dungeon Features. Never discover the same Feature twice in a playthrough. 12 hard to find Legendary Locations, featuring unique encounters, treasures and effects, including 2 difficult to obtain fabled swords. 6 unique level bosses Final boss with 27 possible configurations -description from the designer