The Fifth Doctor

The pacifist's growth engine, and the design is a neat inversion of how counters usually work. Almost every incremental-counter payoff in the game rewards aggression: attacking, entering the battlefield, dealing combat damage. This one rewards the opposite. The counters land at your end step on the creatures that stayed home and stayed put, and then it untaps them, so a board that declined to attack still gets both larger and available to block or activate. That single restriction (didn't attack, didn't enter) is the whole engine of its scaling: you cannot grow a creature and swing with it the same turn, so the choice each turn is between pressure now and a bigger, defended board later. It builds toward a defensive stall that eventually crushes rather than a race, which is rare for a payoff that compounds this quickly. The untap clause is quietly the most important line: it means the coexistence isn't purely passive, since those grown, untapped bodies are free to hold up abilities or wall the next attack. As a legendary Time Lord meant to anchor a slower Azorius shell, it asks a deck to be patient in a way white and blue can afford to be, turning the accumulation of turns into an accumulation of stats on a board that never had to expose itself in combat to earn them.