 Unfortunately, the star flared, first into a supernova, and then collapsed into a black hole.Omega was thought killed in that explosion but unknown to everyone, had somehow survived in an anti-matter universe beyond the black hole's singularity.Rassilon, the ultimate founder of Time Lord society, then took a singularity (assumed by fans and the spin-off media to be the same one as Omega's) and placed it beneath the Time Lords' citadel on Gallifrey.