Cleric Class is a uncommon Enchantment — Class card from The List (PLST), collector number AFR-6. Current market price: $0.98, TCGplayer market prices via Scryfall.
(Gain the next level as a sorcery to add its ability.) If you would gain life, you gain that much life plus 1 instead. {3}{W}: Level 2 Whenever you gain life, put a +1/+1 counter on target creature you control. {4}{W}: Level 3 When this Class becomes level 3, return target creature card from your graveyard to the battlefield. You gain life equal to that creature's toughness.