Power Armor

Most cards that counted basic land types scaled a fixed effect and resolved once. This one bolts that scaling onto a repeatable pump engine, turning a wide manabase into a recurring combat advantage rather than a single burst. The cost structure tells you the intent: three mana and a tap per activation, plus four to deploy. Because it is an artifact with an unrestricted activated ability, the pump fires at instant speed, so you can hold it up through the declare-blockers step to grow an attacker or blocker before damage is assigned, or to push lethal once attackers are locked in. The tap is the real governor: every activation is a turn you did not spend deploying something else, and that tension between developing the board and growing it is where the card lives. A two-color deck gets a mediocre +2/+2 trick on a stick; the full rainbow turns any creature into a +5/+5 threat-multiplier, fired again and again. It is a colorless artifact precisely so the reward sits in the lands rather than the spell, sidestepping the color identity it amplifies. The lineage runs straight to later domain payoffs that scaled removal and card draw the same way, but this version tied the count to an ongoing board state rather than a single resolution.