A unique tower defense game where you create gems and place them into towers to kill the advancing monsters. Mana points are required to create/combine gems and build towers and trenches. Your mana also acts as your health, and diminishes when a monster reaches your base. Combine your gems to produce gems of a higher grade. The higher the grade, the more powerful the gem is. In addition to being placed into towers, gems can also be thrown at enemies. Try to complete each map with the best score possible. Skill points are gained as you progress, which can be used to buy upgrades.