Star wars: darth vader #48

LUKE…JOINS THE DARK SIDE?! It is said there can be only two SITH, the EMPEROR AND DARTH VADER. But could it someday be PALPATINE and LUKE SKYWALKER? Or Vader and his son? THE HANDMAIDEN SAB finally tests Luke - with WARBA'S life in the balance! And THE SCHISM IMPERIAL reveals its hidden hand!