Crystal Pillar (Final Fantasy VIII)

The Crystal Pillar was discovered by the ancient Centra civilization. The Centra viewed it as a source of divine power and moved it to their own capitol, unaware that the Crystal Pillar was really a tool that reacted with the moon to aid in the Lunar Cry, the process of monsters arriving on the planet. Rediscovered by the Estharians the Pillar was excavated and placed inside a mobile fortress known as the Lunatic Pandora to be used as a weapon, however it was deemed too dangerous and sunk in the oceans before being resurrected once again, this time by the Galbadians, and used to initiate a Lunar Cry to assist in Sorceress Ultimecia's schemes.