助っ人、荒れ狂う黒馬 is a Weiß Schwarz card from ご注文はうさぎですか？？ GU/W44-067. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When this card is placed on your climax area from your hand, draw a card, choose one of your characters, and that character gets +2000 power and +1 soul until end of turn.