Smallville Season 11 #25

Haunted' part 1! Lex Luthor dives far into his own mind, trying to force Tess into revealing her secrets. Just as he's about to make a breakthrough, he's forced to confront a former...experiment...named Psimon, who's after his blood. If only Lex could remember him! Will Superman be able to stop Psimon, or will he need the help of a very fast friend?