Rix Maadi Guildmage is a uncommon Creature — Human Shaman card from Return to Ravnica (RTR), collector number 192. Current market price: $0.13 (foil $0.34), TCGplayer market prices via Scryfall.
{B}{R}: Target blocking creature gets -1/-1 until end of turn. {B}{R}: Target player who lost life this turn loses 1 life.