Resolute Watchdog is a uncommon Creature — Dog card from Ravnica Allegiance (RNA), collector number 19. Current market price: $0.31 (foil $3.48), TCGplayer market prices via Scryfall.
Defender {1}, Sacrifice this creature: Target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)