Dragritter, Mardau

:When this unit is placed on , if you have a grade 3 or greater vanguard with "Alphard" in its card name, 1, choose one of your opponent's rear-guards, retire it, and this unit gets +5000 until end of turn. :When this unit attacks, if you have a grade 3 or greater vanguard with "Alphard" in its card name, and your damage zone has three or more cards, this unit gets +5000 until end of that battle.