 Like the comics, Luthor is fully aware that the ring he wears is fashioned with a kryptonite stone, which he uses to keep Superman from attacking or apprehending him (although this required very close proximity to work).Other characters include Cybron (a pastiche of Brainiac whose Post-Crisis conception was still undecided at the time) and an appearance of Wonder Woman, which was her first non-print appearance since George Pérez's reworking of William Moulton Marston's superheroine for the post-Crisis era.Syrene the Sorceress of Time was portrayed by voice actress B. J.