一番大切なこと レナ is a Weiß Schwarz card from グリザイア：ファントムトリガー GRI/S112-002. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 [Send 1 of your other 《Grisaia》 characters on stage to Waiting Room] When this is placed on stage from hand, if all of your characters are 《Grisaia》, you may pay cost. If you do, choose 1 card in your Clock, add it to hand. 【AUTO】 {CX Combo} [Discard 1 《Grisaia》 character] When this attacks, if you have the Choice CX (020) in your CX Area, you may pay cost. If you do, deal 2 damage to your opponent, then perform the following effect, "[(2) Discard 1 《Grisaia》 character] If the slot across from this has no characters, you may pay cost. If you do, deal 2 damage to your opponent."
This card was printed in Japanese only; the English text above is an unofficial community translation.