Long ago, Lord Mumm-Ra learned of its existence and sent his fleet of warships to besiege the planet. His servants included the ancient ThunderCats who served their demonic master by attacking the world. Among his minions was Captain Tygus who led the assault on the city containing the War Stone where he was ordered to destroy anything that kept him away from it. Ultimately, he managed to slay several of the alien defenders and placed his hands on the War Stone which shrunk into a smaller red crystal that became the basis of the Eye of Thundera. This relic became one of the treasures in Mumm-Ra's possession along with three other such gems.