Spectral Duke Dragon

(This ability is active if you have four or more damage):[ 2 & Choose three of your Gold Paladin rear-guards, and retire them] At the beginning of the close step of the battle that this unit attacked a vanguard, you may pay the cost. If you do, this unit, and this unit loses "Twin Drive!! ([TwinDrive])" until end of turn. :If you have a card named "Black Dragon Knight, Vortimer" in your soul, this unit gets +1000.