Hedron-Field Purists is a rare Creature — Human Cleric card from Rise of the Eldrazi (ROE), collector number 25. Current market price: $0.36 (foil $0.61), TCGplayer market prices via Scryfall.
Level up {2}{W} ({2}{W}: Put a level counter on this. Level up only as a sorcery.) LEVEL 1-4 1/4 If a source would deal damage to you or a creature you control, prevent 1 of that damage. LEVEL 5+ 2/5 If a source would deal damage to you or a creature you control, prevent 2 of that damage.