The Mother Elf can eradicate all traces of the Maverick Virus, which had affected the galaxy, in one fell swoop: http://www.vgmuseum.com/mrp/manual-mmx5.htm
Even presuming only one other solar system was affected? The nearest star to earth is 4.22 light years away, meaning that it is in the ballpark of 4436064c for Dark Elf's attack speed.
Zero can keep up with Dark Elf wielders: http://www.youtube.com/watch?v=JMu8ZuM-9W8
assuming he had to go the the farthest reaches of the galaxy?
77,200 light-years
Making this feat: 81,152, 640, 000c