Knight of the Reliquary is a rare Creature — Human Knight card from Conflux (CON), collector number 113. Current market price: $2.25 (foil $12.39), TCGplayer market prices via Scryfall.
This creature gets +1/+1 for each land card in your graveyard. {T}, Sacrifice a Forest or Plains: Search your library for a land card, put it onto the battlefield, then shuffle.