Lionheart Maverick

The pump ability is the tell of its era: five mana to give a one-drop +1/+2 for the turn is the kind of mana sink common-rarity creatures carried before designers learned that a sink nobody activates is dead text on the card. The math never works out. By the time you have five mana to spend, a 2/3 vigilant attacker for the turn is not the board state you needed to manufacture, and the body it sits on (vigilance on a 1/1) is closer to a keyword reminder than a threat. What it represents is a transitional design philosophy: the instinct to never leave a creature with nothing to do in the late game, executed before the cost-to-payoff ratio got disciplined. Knights and Humans both became supported tribes in the years after, but this one predates the payoffs that would have given a one-mana white attacker a reason to exist beyond its own stat line. It is honest about what it is: a filler attacker for an aggressive white deck that needed bodies at the one-slot, with a mana ability bolted on so the card would read as if it scaled. It does not scale. The vigilance is the only line that matters, and even that is doing the modest work of letting a small attacker hold back a blocker.