Railway Brawler is a mythic Creature — Rhino Warrior card from Outlaws of Thunder Junction (OTJ), collector number 344. Current market price: $9.77 (foil $13.10), TCGplayer market prices via Scryfall.
Reach, trample Whenever another creature you control enters, put X +1/+1 counters on it, where X is its power. Plot {3}{G} (You may pay {3}{G} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)