Cursed Spear Revenger, Diarmuid

(This ability is active if you have four or more damage):［Choose one of your rear-guards with "Revenger" in its card name, and retire it] When this unit attacks a vanguard, you may pay the cost. If you do, this unit gets +5000/ +1 until end of that battle. :When this unit attacks a vanguard, this unit gets +3000 until end of that battle.