Patrol Signaler

That untap symbol reads backwards from instinct: paying means untapping the Signaler, which means the body has to be tapped before you can fire the ability at all. The honest way to charge it is the most basic one: send it to attack, let combat leave it tapped, then spend and the untap to produce a 1/1. The natural rhythm, then, is one token per turn, paid for by the attack step rather than handed out for free; the untap step works against you here, righting the creature before you ever get to use the cost. Open up the tap-untap channel and the same modest line turns into a token engine: a convoke outlet, a permanent that taps the Signaler for some unrelated effect, or any way to flip a creature between states more than once per turn lets you reactivate it again and again, with the per token standing as the only real governor on how wide the board gets. That is the design tension baked into any -cost producer. The symbol is trivially abusable because the game offers so many ways to tap and untap a creature, so the mana cost is loaded heavy enough to keep an unfocused deck honest while leaving the loop fully intact for anyone who assembles the cycle on purpose. On its own it is a fragile 1/1 that trades an instant's convenience for permanence, raising a soldier army one patient combat at a time and asking only that you keep the producer alive long enough for the arithmetic to add up.