Thunderbird leads the dead X-Men to save the spirit of Earth itself from the Chaos King's thrall! To wake the Great Spirit, father of the world, our fallen heroes must rise to the occasion. It's a true life or death struggle that can only end in one side holding all the power of Mother Nature! Will any X-Men survive to join the final battle for all reality?
— Description from Comic Vine community (comicvine.gamespot.com).
