Revenger, Desperate Dragon (BT15/S01EN) [Infinite Rebirth]

[AUTO](VC) Limit Break 4 (This ability is active if you have four or more damage) :[Counter Blast (1)-card with "Revenger" in its card name] When this unit attacks a vanguard, if the number of rear-guards you have is more than your opponent's, you may pay the cost. If you do, this unit gets [Power]+5000/[Critical]+1 until end of that battle. [AUTO](VC):[Choose one of your rear-guards, and retire it] At the beginning of your main phase, you may pay the cost. If you do, your opponent chooses one of his or her rear-guards, and retires it. [CONT](VC/RC): Lord (If you have a unit without a same clan as this unit, this unit cannot attack)