Those who set foot in the cursed Valley of Darkness were fated to wander its wastes until they rotted away. It used to be a serene land abundant with life until the arrival of a girl named Meglia. Such was her beauty that the land itself became infatuated with her. The infatuation turned to greed, which manifested into a ferocious dragon. The dragon slaughtered all other creatures until only it and Meglia remained.
Added on September 3, 2014 as a highest Reward for Heroes Colosseo XV, altogether 160 cards:
- Class SS 1 (x2), 2-3 (x2), 4-7 (x2), 8-13 (x2), 14-19 (x2), 20-25 (x2), 26-30 (x2), 31-40, 41-50.
- Class S 1 (x2), 2-4 (x2), 5-8 (x2), 9-15 (x2), 16-30, 31-45.
- Class A 1 (x2), 2-4, 5-10, 11-15.
- Class B 1 (x2), 2.
- Class C 1.