Warlord, a former navy test pilot who landed in Skartaris years ago and made it his home, asks Supergirl, Green Lantern, Stargirl and S.T.R.I.P.E. for their help in protecting his land. Deimos is gathering troops to conquer Skartaris and acquire the Great Stone, which is actually a large piece of Kryptonite revered for hits ability to heal. The JLU team agrees to help Warlord as he faces Deimos and his troops in the battle for Skartaris.