Burning Horn Evolute

:[ 1 & Choose a card with "Overlord" in its card name from your hand, and reveal it] When this unit is placed on , you may pay the cost. If you do, choose an opponent's rear-guard in the same column, and retire it. :If you have a grade 4 vanguard with "Overlord" in its original card name, this unit gets +2000 for each card in your opponent's damage zone.