Insatiable Harpy

Flying and lifelink stacked on a four-mana 2/2 is a body nobody respects on the ground and nobody wants to leave unanswered in the air. The size is the cost: this dies to almost any removal and trades poorly into combat, which is the price for getting both keywords on one card. What you buy in return is a creature that races and stabilizes in the same swing. Every connection is a four-point life swing (two off the opponent's total, two back onto yours), and that gap compounds each turn the opponent fails to find an answer above the ground. The trade is rate for resilience: you give up raw stats for a cheap flier that chips at a stalled life total while quietly winning attrition fights it has no business entering. That combination of evasion plus lifegain is exactly the role bigger black demons and angels charge a premium to fill; here it sits at the workmanlike middle of a curve rather than its top, the kind of creature that buys time and pressures life totals at once without ever being the card a deck is built around.