Ardbert, Warrior of Darkness

A counters payoff that reads a spell's color rather than card types, which is the wrinkle worth pausing on. Most anthem-and-counter engines want a specific spell type or a keyword hit; this one only cares which half of the guild you cast, then hands out combat keywords tuned to that color. A white cast grows the team and lets it hold ground with vigilance; a black cast grows the same team and lets it punch through with menace. The 2/2 body does none of the work: the engine lives entirely in legendary critical mass, because both triggers reinforce every legend you control at once and grant the whole squad a keyword in the same beat. That anchoring to the legendary supertype (rather than a tribe or a keyword) is doing more than it looks, and it turns spell sequencing into a real decision. A white-heavy turn accumulates on defense while it builds; a black-heavy turn converts the same stacked bodies into a squad that demands two blockers apiece. Lean on both and the board after your turn reflects which color you favored and when, so the reward is not just casting spells but ordering them by color. Two-axis counter engines are common enough; one that keys its two axes to a spell's color and pins the whole payoff to how many legends share the battlefield occupies a corner most +1/+1 designs never reach.