Legion of Super-Heroes Vol. 5 / Supergirl and the Legion of Super-Heroes (2004-2009) #17

Plot

Adjusting herself to the 31st Century, Supergirl believes this all to be a dream as part of a Kryptonian coming-of-age ritual. To prove her point, Supergirl begins to assert her will, causing certian things to happen, including an offer of membership in the Legion! Elsewhere, the Dominators have hatched a plot to conquer Earth once again, and have seemingly already sent an organism of some sort to do their dirty work!