Star-vader, Multiverse Dragon

(This ability is active if you have four or more damage): 1 When this unit is placed on , you may pay the cost. If you do, choose one of your opponent's rear-guards, lock it, and this unit gets +5000 until end of turn. (The locked card is turned face down, and cannot do anything. It turns face up at end of the owner's turn.)/:Lord (If you have a unit without a same clan as this unit, this unit cannot attack)