Ratcatcher is a rare Creature — Ogre Rogue card from Dissension (DIS), collector number 52. Current market price: $9.30 (foil $20.07), TCGplayer market prices via Scryfall.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, you may search your library for a Rat card, reveal it, put it into your hand, then shuffle.