The Corsair Dark Core RGB SE is an almost flawless wireless gaming mouse that you can wirelessly charge with almost anything. (techradar.com)
For example when Rare presented Perfect Dark Core to MS after working on the title for a year, only one level was completed and Joanna Dark didn't even have a proper character model. (n4g.com)
Narrow, dark cores flicker within the bright filaments of gas around sunspots. (sciencemag.org)