Red Herring is a rare Creature — Fish card from Mystery Booster Playtest Cards 2021 (CMB2), collector number 62. Current market price: $0.20, TCGplayer market prices via Scryfall.
{1}{U}: Exchange Red Herring from your hand with a permanent you control on the battlefield or a spell you control on the stack. If that permanent or spell was the target of a spell or ability, change that target to Red Herring.