This cover is number 13 of 48 in a series of special covers that commemorates the fortieth anniversary of the Star Wars franchise.
This issue is a variant of Doctor Aphra (Marvel, 2017 series) #6 [Kamome Shirahama].
There exist further variants:
Doctor Aphra; Captain Tolvan; Rur; Black Krrsantan; Amon
Synopsis
Aphra and her father have entered the Citadel of Rur, once home to the mysterious Ordu Aspectu, and awakened a powerful being that calls itself Eternal Rur.