Sterling Supplier

Read the enters trigger closely and one word defines the card: "another." The counter can never land on the Bird itself, and on an empty board the trigger has nowhere to go and fizzles. That restriction is what gives the design its purpose. Instead of a spell you have to shepherd past removal, it deposits a permanent stat swing directly onto a creature already in play, so the growth persists even when the Bird itself is later killed off. The one-shot nature is also why the trigger is worth abusing: blink and reanimation convert a single placement into repeated ones, dropping a fresh counter onto whatever is on the battlefield each time the Bird re-enters. Left alone it fires once and stops, but a deck built to flicker it treats that ETB as a button worth pressing over and over. The 3/4 flying body keeps the card doing work once the counter is placed, contesting the air rather than idling as a spent shell. None of this is flashy; it is white's stake in a +1/+1 counters theme, a payoff aimed at a deck that has already made counters its plan, not a card asking anyone to construct that deck from scratch.