Smallville season 10 episode 21 is about Tess discovering that a planet is coming to destroy earth. While she is doing further study on it, she realizes that Oliver is in the custody of Darkseid. Oliver is given a ring made of Gold Kryptonite by Dessad, Godfrey and Granny, and they ask him to give it to Clark for his wedding. Knowing that this will take all of Clark’s powers away, Chloe prevents Clark from wearing it. With Clark’s help, Oliver is able to remove the Omega tattoo and Darkseid’s control over him. On the other hand, Leonel tries to force Tess into transplanting her heart into another clone, but Tess escapes from all this. Watch this episode as it will show Leonel trading his soul for Lex’s life on the arrival of Darkseid.  When Darkseid confronts Clark, Clark realizes this is the moment for which Jor El has been preparing him. A download of the episode is must, to witness this thrilling moment.