肝試し is a Weiß Schwarz card from ガールフレンド（仮） GF/W33-045. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
● Choose 1 of your Character, during that turn, it gets +X Power. X is equals to the number of your Yellow Characters x1000.
This card was printed in Japanese only; the English text above is an unofficial community translation.