Auriok Bladewarden

The pump it hands out scales off its own power, which on a base 1/1 means a tap to grant some creature +1/+1: not nothing, but a far cry from the engine the wording hints at. Grow it instead, and the math compounds. Hang an equipment on it, slide an anthem under it, or stack a few +1/+1 counters, and every point of power you add becomes the size of a bonus it can repeatedly grant for the cost of tapping. A Bladewarden carrying three extra power taps to make a blocker or attacker +4/+4, and it does it again every turn it survives. That feedback loop, where pumping the creature makes its activated ability hit harder, is the whole design tension: the body is deliberately fragile and the ability deliberately keyed to power, so the payoff lives entirely in how much investment you are willing to risk on a small creature. With no haste, even the first activation waits a turn. It functions less as a creature than as a repeatable combat multiplier bolted onto whatever you can keep alive. And because the activation costs a tap, it competes with attacking; the choice between swinging with the Bladewarden and holding it back to inflate someone else is the recurring decision it forces, turn after turn, every time the thing untaps with a target in front of it.