Militia's Pride
The trigger fires during the declare-attackers step, and that timing is the engine: each token arrives already tapped and attacking, so it skips summoning sickness entirely and joins the swing it was born from. That turns the attack step into a resource sink. A board that commits four nontoken creatures to the red zone can spend up to four extra white mana mid-combat to widen further, with each new attacker contributing damage on the spot. The payment clause taxes per attacker rather than per turn, so the engine scales with how much pressure you have already declared rather than offering a flat bonus the way an anthem does: the more bodies you swing with, the more the tokens compound. The nontoken restriction is the load-bearing limit. It stops the obvious loop (a token making a token making a token) and forces the engine to ride on a base of real creatures you paid for elsewhere, which makes this less a token-generator from nothing and more a tax-funded combat multiplier for a deck already winning the ground. It belongs to the lineage of white's go-wide enchantments that reward commitment in combat, trading mana for board presence at the exact moment board presence converts to damage.
