Mystic Crusader is a rare Creature — Human Nomad Mystic card from Odyssey (ODY), collector number 33. Current market price: $0.42 (foil $12.69), TCGplayer market prices via Scryfall.
Protection from black and from red Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has flying.