Action Comics (1938) #1077

DEATH TO THE PHANTOM ZONE! 

Superman and Mon-El are reunited at last, but are our heroes too late to stop the impossible threat of Aethyr?! The mad wizard has breached the realm and begun decimating planet Earth...the Super-Family and the Justice League are holding on as best they can, but this sounds like a job for Superman! Plus, can Kara put her feelings aside and carry out the mission Superman gave her?