Legion of Super-Heroes Vol. 4 (1989-2000) #97

Plot

Genesis strikes the Legion as several members' powers are altered -- perhaps forever! If that weren't enough, the deadly Mantis attacks the Legion; Brainy meets Metron of the New Gods and gains the last component he needs for his super-computer -- which is desperately needed to get the time-lost teens back to the future! Plus, Phase (from L.E.G.I.O.N.) meets Apparition! (mycomicshop.com)