Sandsteppe Mastodon is a rare Creature — Elephant card from Fate Reforged (FRF), collector number 137. Current market price: $0.14 (foil $0.29), TCGplayer market prices via Scryfall.
Reach When this creature enters, bolster 5. (Choose a creature with the least toughness among creatures you control and put five +1/+1 counters on it.)