According to the "Blackest Night" prophecy, each one of the new Corps are driven by a specific emotion and empowered by a color of the emotional spectrum. Each of these emotion powered spectrum Corps colors, based on the prophesy, are to converge, leading to the mother of all wars,... The War of Light that would end the universe as we now know it. The Blue spectrum represents the emotion of Hope! The first Blue ring was created by Ganthet and Sayd and Hope is the color's source of power. Saint Walker, The first Blue Lantern, made his glorious appearance in the "Final Crisis: Rage of the Red Lanterns" story line. The second Blue Lantern, Warth, (not the same guy on STNG, fool!) was chosen by Saint Walker and made his glorious appearance in GL #36. Be sure to catch the rest of the story and buy the graphic novel!