Paladin of Prahv is a uncommon Creature — Human Knight card from Dissension (DIS), collector number 14. Current market price: $0.24 (foil $1.00), TCGplayer market prices via Scryfall.
Whenever this creature deals damage, you gain that much life. Forecast — {1}{W}, Reveal this card from your hand: Whenever target creature deals damage this turn, you gain that much life. (Activate only during your upkeep and only once each turn.)