黒狼の牙
Fangs of the Black Wolf is a Weiß Schwarz card from 無職転生 ～異世界行ったら本気だす～ MTI/S83-075. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
If you do not have a 《Six-Sided World》 character, this card cannot be played from your hand. Choose 1 《Six-Sided World》 character in your waiting room, and return it to your hand. Choose 1 of your characters, and that character gets +1000 power and the following ability until end of turn. "【AUTO】 When this card's battle opponent becomes 【REVERSE】, you may put the top card of your deck into your stock."