Bishop: Giallo Mace (C)

[Counter] 【Act】 "Oppress" During your turn, you may pay 1 gauge. If you do, put this card on an opponent's open left or right monster area. If this card is on that area, it becomes oppressed. (An oppressed area becomes your field, and other monsters cannot be put on it.) If you have oppressed areas on your field, all monsters on your field gets power+3000 and defense+3000!