basically Palpatine cloned himself using the same tech as that for Boba Fett.
WookieepediaDark Empire was a series of comic books written by Tom Veitch and illustrated by Cam Kennedy. They were originally released by Dark Horse Comics between December 1991 and October 1992 as a 6-issue bi-monthly series, which were later compiled and sold as trade paperback. The name generally...
https://starwars.fandom.com/wiki/Dark_Empire