Paladin of Prahv is a uncommon Creature — Human Knight card from Duel Decks: Knights vs. Dragons (DDG), collector number 22. Current market price: $0.13, 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.)