Thrashing Mossdog is a common Creature — Plant Dog card from Ravnica: Clue Edition (CLU), collector number 176. Current market price: $0.11, TCGplayer market prices via Scryfall.
Reach (This creature can block creatures with flying.) Scavenge {4}{G}{G} ({4}{G}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)