夜戦強襲 シルヴィア is a Weiß Schwarz card from グリザイア：ファントムトリガー GRI/S112-030. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When this attacks, choose 1 of your characters, this turn, it gets +2500 power. 【ACT】 [Discard 1 《Grisaia》 character] Reveal the top card of your deck. If that card is a 《Grisaia》 character, this turn, this gains the following ability, "【CONT】 When this attacks, you can choose 1 of your opponent's back row characters, this card may Front Attack that character instead as the Defending character."
This card was printed in Japanese only; the English text above is an unofficial community translation.