決意 is a Weiß Schwarz card from D.C. D.C.II DC/W01-019. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Choose 1 of your 《魔法》 Character, during that turn, it gets +2000 Power, +2 Soul. At the end of turn, place that Character into Memory.
This card was printed in Japanese only; the English text above is an unofficial community translation.