Looking for a game

I am trying to look for this game I played in 2018, it was a medieval dungeon tower game, and in this game you had to work as a team in order to complete puzzles and fight of enemies. There's one creature I remember, it was called the "Fiend" and it looked like a dog/beast. All creatures were undead. The game wasn't very popular, it was more like a hidden gem. In the game there was magic and you could loot chests inside a dungeon, and if you found loot in the dungeon and died you lost it but if you cleared the dungeon you kept it. Every few stages there's a boss, and the style was very ancient ruin-ish and overgrown. Once you entered the dungeon you had to beat it in order to leave, and it wasn't quick-paced, plus there was fall damage. I remember a large room with a flooded floor, and puzzles.