:When this unit is placed on or rode upon, [COST][Counter-Blast]1 & discard a card from your hand], choose one of your opponent's rear-guards, and lock it. If your damage zone has four or more cards, choose one rear-guard from your opponent's front row and back row instead.
(VC/RC):During your turn, this unit gets +5000 for each of your opponent's locked cards.
Right here, is the edge of zero.