武士の誓い is a Weiß Schwarz card from クレヨンしんちゃん CS/S28-097. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Choose 1 of your 《家族》 Character and 《和服》 Character separately, until the end of your opponent's next turn, they get +2500 Power.
This card was printed in Japanese only; the English text above is an unofficial community translation.