Auspicious Ancestor

The repeatable trigger keys off something genuinely communal: every white spell that hits the stack, from any player including its controller, offers an optional sink where one mana buys one life. That choice ties the card's value to how much white is being played around it. In a slow grind against another white deck the trigger fires constantly; in a metagame light on white it does little but sit there. The body must be white to cast in the first place, which keeps a floor under the effect, but the ceiling belongs to the board. The death trigger is the consolation prize, a flat three life when the creature finally dies, a small payoff that rewards trading it away rather than hoarding it. Taken together it is a card about attrition in the most literal sense: it does nothing fast, threatens nothing, and instead drips advantage out of a long game where white spells keep accumulating. The contrast with later lifegain design is the point. The modern instinct is to make a life total do something: trigger a payoff, scale a threat, refill a hand. This one just gains the life and waits, built on a philosophy that trusted incremental value to matter on its own and demanded a patience the card itself could never enforce.