Tetsuko Umezawa, Fugitive

The whole engine here is a static evasion clause that turns the lowest stat lines in the game into unblockable threats, which means the card's value scales with how many tiny bodies you can field rather than with its own modest frame. Power or toughness 1 or less is a generous condition: it sweeps up mana dorks, token swarms, X/1 utility creatures, and anything reduced to that range by a counter, all of them suddenly unable to be stopped at the blocking step. That makes her a payoff piece for two distinct strategies that rarely overlap: go-wide token decks that want their chaff to connect, and any deck running a creature whose triggered or combat-damage abilities only matter if it lands a hit. The design rewards going low rather than going big, an inversion of the usual blue tempo logic. Note the wording is "can't be blocked," not menace or a damage-prevention shield, so the evasion is unconditional rather than situational, and it applies to the whole board at once rather than to a single attacker. Tetsuko qualifies under her own ability, slipping in for a point of unblockable damage a turn, but the body is a delivery system for the static, not the reason to run it. As a two-mana legendary built around stat lines most decks ignore, she occupies a small niche, but the niche is a real one.