Supergirl & the Legion of Super-Heroes #28

The Legion and the Wanderers have joined forces to take the Dominator War away from Earth and to an unfamiliar realm where life is cheap and victory is dear. And at long last, the Dominators' link to the events of 52 is revealed!

Image: Supergirl & the Legion of Super-Heroes #28 - DC Comics

Supergirl & the Legion of Super-Heroes #28