Mowu, Loyal Companion is a uncommon Legendary Creature — Dog card from Commander Masters (CMM), collector number 306. Current market price: $0.24 (foil $0.36), TCGplayer market prices via Scryfall.
Vigilance, trample If one or more +1/+1 counters would be put on Mowu, that many plus one +1/+1 counters are put on it instead.