Ledev Champion is a uncommon Creature — Elf Knight card from Guilds of Ravnica (GRN), collector number 186. Current market price: $0.13 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever this creature attacks, you may tap any number of untapped creatures you control. This creature gets +1/+1 until end of turn for each creature tapped this way. {3}{G}{W}: Create a 1/1 white Soldier creature token with lifelink.