Sparring Dummy is a uncommon Artifact Creature — Scarecrow card from Avatar: The Last Airbender (TLA), collector number 197. Current market price: $0.13 (foil $0.23), TCGplayer market prices via Scryfall.
Defender {T}: Mill a card. You may put a land card milled this way into your hand. You gain 2 life if a Lesson card is milled this way. (To mill a card, put the top card of your library into your graveyard.)