Loyal Warhound is a rare Creature — Dog card from Adventures in the Forgotten Realms (AFR), collector number 363. Current market price: $0.99 (foil $2.21), TCGplayer market prices via Scryfall.
Vigilance When this creature enters, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.