Fishing for the River Guardian is a Weiß Schwarz card from Persona 4 ver.E P4/EN-S01-044. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Put the top card of your deck into your stock. Search your stock for up to one character, reveal it to your opponent, and return it to your hand. Shuffle your stock afterwards.