自己鍛錬
Self-training is a Weiß Schwarz card from Fate/stay night [Unlimited Blade Works] FS/S34-031. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Until end of turn, all of your characters get +1500 power and the following ability. "【CONT】 This card cannot be chosen by your opponent's effects."