水着のライダー is a Weiß Schwarz card from Fate/hollow ataraxia FH/SE03-019. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When you use this card's 『ASSIST』, choose 1 of your 《マスター》 characters, during this turn, it gets +1000 Power. 【ACT】 ● ASSIST 1000 Level 1 ［Discard this card from hand to Waiting Room］ (Choose 1 Character being Front Attacked, during this turn, it gets +1000 Power)
This card was printed in Japanese only; the English text above is an unofficial community translation.