Envoy of the Ancestors

Outlast has always been a low-throughput mechanic: you tap the creature at sorcery speed, hold it back from combat, and slowly grind a single body upward, one +1/+1 counter at a time. That patience never carried much of a payoff, which is why the second line here does the load-bearing work rather than the counter-stacking. White has long handed lifelink to creatures wearing counters (Abzan Battle Priest is the obvious antecedent), so a static anthem in this color sits squarely on the pie; what widens the design is the definition of "modified." Equipment, Auras, and counters all qualify, so the effect reaches well past the outlast keyword that nominally defines the card. A board of counter-getters, suited-up attackers, and enchanted blockers all drain life on contact, whether or not any of them ever outlasted anything. The tension is that the 2/3 has to stay on the battlefield to keep the lifelink online, and outlast asks it to sit still to grow, pulling against actually swinging with the team it is buffing. What makes it an engine piece rather than a filler Cleric is that both halves feed one plan: a wide, incrementally built board that converts combat damage into life, then keeps thickening its anchor when the coast is clear. It stitches white's counters-matter and Voltron shells together under a single lifegain umbrella, with modification itself as the qualifying condition.