Lone Missionary

Four life on a two-mana creature lands at the rate where lifegain stops being a tax on a worse card and becomes the reason you run it: enough to swing a fast race, cheap enough to chain or recur, and stapled to a 2/1 that can still trade in combat or carry a buff. The lineage runs through every small-body, fixed-payment lifegain creature white has printed; the casting cost is the floor that stops the gain from being free, and the modest power means the body alone is never the draw. What gives it staying power past its rate is the enters trigger, which converts the card from a one-time spell into a reusable unit of life. Blink it, return it from the graveyard, copy it, and the four life arrives again every time, so it belongs in builds that wring repeated value out of creatures entering the battlefield rather than in a fair curve of attackers. The Kor Monk classification is incidental; this card was never about the creature type, and it was never trying to be a beater. It is a measured payment dressed as a body, and the body exists mostly so the payment has somewhere to live.