Cathars' Crusade

The math compounds, and that is the entire reason this enchantment lives where it does. Most go-wide payoffs scale linearly: one counter per token, one trigger per body. This one scales with the whole board on every entry, so the tenth creature does not add one counter to the team, it adds one to all ten while it grows the rest. Each new arrival is worth more than the last, which inverts the usual decay curve of token strategies where the marginal creature gets less relevant as the count climbs. The catch is the entry restriction reading: it fires on creatures entering, not on attacks or upkeeps, so the engine is dead until you can flood the battlefield in a single window. That ties it to populate effects, mass token generators, and recursion loops rather than to a curve of beaters. The double-white cost and the five-mana entry point mark it as a ceiling piece, not a tempo play; you want it down before the explosion, then a single overrun turn settles the game. It also rewards flicker and blink at instant speed, since each return counts as a fresh enter, which is where the symmetry between the buff and the trigger turns from arithmetic into a feedback loop. The counters are permanent and stack with everything, so unlike anthem enchantments it survives its own removal: kill the Crusade and the board keeps the size it already paid for.