What is somehow palpatine returned?

As an AI language model, I have access to some information regarding how Palpatine returned. In the Star Wars sequel trilogy, the character Palpatine was presumed to have been killed in Return of the Jedi (1983). However, in the climactic final act of the ninth installment, The Rise of Skywalker (2019), it is revealed that Palpatine somehow managed to return.

It is suggested in the film that Palpatine survived due to his mastery of the dark side of the Force. His spirit survived his supposed death and he transferred it into a clone body. This clone body was then hidden in the unknown regions of the galaxy, where Palpatine had been building a new army of loyal followers called the Sith Eternal. It is also suggested that the Sith Eternal utilized technology to sustain Palpatine's life force in his new cloned body.

Palpatine's return in The Rise of Skywalker is met with controversy among fans, with some finding it a satisfying conclusion to the Skywalker saga, while others criticize it as a lazy and nonsensical plot twist. Regardless, Palpatine's return marks an important moment in the Star Wars franchise and adds another layer to the character's already complex legacy.