Alpine Houndmaster is a uncommon Creature — Human Warrior card from Core Set 2021 (M21), collector number 215. Current market price: $0.25 (foil $0.38), TCGplayer market prices via Scryfall.
When this creature enters, you may search your library for a card named Alpine Watchdog and/or a card named Igneous Cur, reveal them, put them into your hand, then shuffle. Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of other attacking creatures.