Upgrade Materials.
Match gems to power your spells, and match skulls to smite your enemies! Bile Blackheart. Includes: The legendary Deamon. In Gems of War, you battle your foes not just with swords and sorcery, but with a puzzle board! Then take the spoils of war, and forge a mighty empire. It's highly addictive, easy to learn, and filled with crazy combos and tons of depth.