Keensight Mentor

The vigilance counter is the clever bit, and it exists to solve a problem the second ability creates for itself. The tap ability only pumps creatures that already carry vigilance, so in a deck of ordinary attackers it would do nothing at all. The enters trigger seeds that requirement by stapling a vigilance counter onto a non-Human you control, converting a plain body into both a growing threat and a fresh member of the set of creatures the pump feeds. The design deliberately routes around the Mentor's own creature type: it cannot vigilance-counter itself, and that exclusion steers you toward a board of behemoths rather than a stack of Human bodies. The non-Human clause is not incidental flavor but the mechanical lever that binds the card to a particular kind of board and rewards keyword-counter density over raw creature count. The 1/4 body tells the rest of the story: this is not a threat but an engine that wants to hold the fort and grind a wide board taller one activation at a time. What keeps it from spiraling is the tap cost paired with the vigilance gate, which cap each turn's growth by how much vigilance you have already assembled, so the payoff tracks your setup rather than arriving all at once. It belongs to the counters-matter school where the interesting play is not the card itself but the lattice of keyword and stat counters it helps stack.