The story follows Illuminar the wizard as he battles against Tetragorn the Necromancer's evil forces. With a fleet of dark creatures at his disposal, including spiders, ogres, and Hammerfists, Illuminar must use his long-range Wisp weapon to create an army of light-based forces and triumph over darkness.
The gameplay is divided into three stages. In the first stage, Illuminar stands in the centre of the screen, using his Wisp weapon to create trees that can be used to fend off ogres and other enemies. The player must also kill venom spiders that infect trees, which will wither away if left unchecked.
The player's goal is to produce as many trees as possible during this stage, which are then taken into the vaults for further use. In the second stage, the player must guide these trees into Spider larvae, allowing them to grow and produce more seeds. However, larvae that hatch will turn into Sith Spiders, which can kill Illuminar if not destroyed.
The third stage takes place in Tetragorn's lair, where the player must destroy headstones that trigger his appearance. Once he has appeared, the player must use their Wisp weapon to destroy him while avoiding contact with him.