High Sentinels of Arashin

The activated ability and the static buff are the same engine seen from two angles, but the accounting is more precise than it looks: the Sentinel grows +1/+1 for each other creature you control that has at least one counter on it, not for every counter on the board. A single big target loaded with five counters adds exactly one to the Sentinel's size; five separate one-drops each carrying a counter add five. That threshold-per-creature design is what makes it a width payoff rather than a stacking one, and it is why the sink pointed at fresh bodies does double duty: each new counter recipient is another point on the Bird until they die. The tension is that an isolated Sentinel is just a 3/4 flier and nothing more; it pays off a board that already exists, not a single fat threat. That makes it both mana sink and payoff in one card, the kind of midgame anchor a grindy counters-matters white deck leans on once the early board has stabilized. The flying matters more than the stat line suggests: a counter-loaded ground stall does nothing to stop the largest creature in the air, so a deck built to outnumber can also out-reach. It rewards a board built wide and studded with counters, and asks little of decks that were headed there anyway.