Arcbound Mouser is a common Artifact Creature — Cat card from Modern Horizons 2 (MH2), collector number 3. Current market price: $0.18 (foil $0.43), TCGplayer market prices via Scryfall.
Lifelink Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)