Eradicator, Sweep Command Dragon

(This ability is active if you have four or more damage):[ 2 & 2] When your opponent's rear-guard is put into the drop zone due to an effect from one of your cards, you may pay the cost. If you do, draw a card, choose one of your opponent's rear-guards in the front row, and retire it, and this unit gets +5000 until end of turn. :［Choose one of your rear-guards with "Eradicator" in its card name, and put it into your soul] When this unit is placed on your , you may pay the cost. If you do, choose one of your opponent's rear-guards in the front row, and retire it. /:Lord (If you have a unit without a same clan as this unit, this unit cannot attack)