Anthousa, Setessan Hero

Most heroic creatures from this era turned a targeting spell into a buff for the hero being cast at: a pump, a one-shot growth, an evasion swing. This one points the reward elsewhere. Cast a spell that targets her and up to three lands you control become 2/2 Warriors until end of turn, still lands, untouched as creatures by the body in the middle of the board. The design hands a green deck a way to turn its mana base into a sudden second wave of attackers, but the timing is precise: heroic triggers when the spell is cast, so the animation resolves at instant speed, and to attack with the new bodies you have to fire the spell before combat, then declare the freshly minted Warriors with the rest of your team. Animate them after attackers are declared and they have missed the window entirely. Because the trigger goes on the stack above the spell, she does not even need to survive it: the lands animate whether the targeting spell resolves or gets countered. The real constraints are deckbuilding ones. A single aura or combat trick aimed at the 4/5 puts as much as six extra power on the table, but only if the deck is already stuffed with spells you would want to cast at her anyway, and only if those lands are not the ones you tapped for the spell (animation does not untap them, so a tapped land becomes a tapped 2/2 that cannot attack). Winning a turn through land-as-army rather than ramp-into-fatties has always been a narrow lane, and this is one of the few designs built entirely inside it.