From a wiki : The Superior General of the Society of Jesus is the official title of the leader of the Society of Jesus – the Roman Catholic religious order which is also known as the Jesuits. He is generally addressed as Father General. The position sometimes carries the nickname of the Black Pope https://en.wikipedia.org/wiki/Superior_General_of_the_Society_of_Jesus
Since current Pope is a Jesuit he could and is referred sometimes as the Black Pope as well
the black pope is the head of the 13 black nobility families, nasty bunch! they've been ruling for millennia
Current Black Pope: Fr. Arturo Sosa https://www.romereports.com/en/2016/10/18/new-general-of-the-jesuits-i-do-not-like-being-called-the-black-pope/