Steelfin Whale

Affinity has almost always been priced to cast on turn two or three, a mechanic built to spike a hand full of cheap artifacts into an early threat. This one starts at six and expects you to have most of the discount already assembled, which flips the usual math: it is not a payoff you race toward but a body you land once the board is already an artifact engine. The second ability sharpens the whole design. Untapping on every artifact entering means the creature is functionally never committed to combat on your terms; it can swing, then stand back up as tokens, equipment, or clues resolve on the following turns. That reads like a defensive nod, but the more interesting axis is repeated tapping. Anything that wants an untapped creature (a tap-to-activate ability, a crew cost paid and refunded, a convoke engine) gets fed by the same triggers that already power the deck. The whale wants to be surrounded by cheap artifacts entering in a stream, which is precisely the kind of board affinity decks build anyway, so the untap trigger compounds the very engine that paid for the creature in the first place. It is a top-end for the archetype rather than a curve-topper for a generic blue deck: the affinity discount and the untap payoff both point at the same wide, artifact-dense board.