少女達は戦場へ is a Weiß Schwarz card from グリザイア：ファントムトリガー GRI/S112-067. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
If you have 5 or more characters with "Mihama Academy" in its name, choose 1 of your characters, this turn, it gets +3000 power and the following ability, "【AUTO】 This ability activates up to once per turn. When this card's damage is cancelled, deal 1 damage to your opponent, then deal 4 damage to your opponent."
This card was printed in Japanese only; the English text above is an unofficial community translation.