Lego Star Wars: Rebuild the Galaxy Episode 4 Part Four Episode Title: Part Four Episode Description: Aboard his flagship Separator, Dev forces Sig to use the Cornerstone to activate the warship's superlaser, which destroys and recreates their homeworld of Fennesa as a green pastoral world. Dev invites his younger brother Sig to combine their powers and rule the galaxy together. Sig rejects his older brother's overtures while Rey and the other Sith stage a coup d'etat against their Sith Lord. Sig and Bob take advantage of the coup to escape into space. On Dagobah, Yesi and Greedo escape the prison and use the stolen Dark Falcon to turn the tables on Solo and the Ackbar troopers. Leia's rebels, Palpatine's Jedi, Yesi's group, C-3PO and the Ewok mercenaries launch an attack on Dev's fleet above Fennesa. During the space battle, Dev unleashes the Separator's superlaser, which causes heavy casualties. Sig and Bob defeat Dev during a climatic duel and reclaim the Cornerstone. Dev escapes the battle with his surviving fleet. On Dagobah, Sig restores the Cornerstone to the Force Builder temple and buries the Temple. Together with Yesi and a rebuilt Servo, the Force builders travel to the planet Alistan Nor to continue Sig's training. Meanwhile, Darth Rey and Darth Rose Tico hire the Landolorian and Grogu to hunt down Sig.