Valley of Treasures is an additional game mode where Skill Cubes and Shards can be found.
Valley of Treasures consists of acts and chapters that develop Valley's story.
You need special Valley of Treasures' Energy to complete chapters in Valley of Treasures mode. Valley of Treasures' Energy restores itself over time.
At the end of each chapter you will gain one, two or three stars. The number of stars depends on the number of heroes that survive the battle.
You can repeat 3-star chapters straight away by using Memory Spheres.
Victory in Valley of Treasures mode chapters gives you the following rewards: Silver, Skill Cubes, Experience Potions, Shards and Rune Coins.