Cliffside Lookout
A one-mana white body whose own activated ability is priced so far outside an aggressive curve that it almost never gets switched on: five mana for a single +1/+1 to your team is a ceiling, not a plan, and the deck this creature belongs to is not the kind that sits on five untapped lands waiting to spend them. The ability is real, but it is a long-game mana sink bolted onto a card that does its actual work the moment it arrives. The job is the creature type. It is a Kor Ally that costs as little as an Ally can, and in a shell built around rally triggers (the abilities other Allies carry that fire whenever an Ally enters the battlefield) the cheapest possible Ally is exactly the body you want flooding the board and chaining those triggers. That reframes it as a quantity card rather than a quality one: its purpose is to be cheap and to be an Ally, in that order, with the pump as a courtesy for grindy games where nothing else is happening. Note that the Lookout carries no rally ability of its own; it is the entering creature that sets off the rally triggers already sitting on your other Allies, not a card that grows the ones landing after it. Read alone, the activation is an awkward line no one builds around; read as enabler, the scout pulls value out of every Ally on the board the instant it lands.

