Sunblade Elf
A green one-drop that asks you to play white. The +1/+1 it gets for controlling a Plains is the obvious hook: a 2/2 for one mana the moment your second color shows up, a small bonus that two-color aggro shells were built to collect. But the pump button is where the design intent surfaces. Spending four generic and a white to give your whole board +1/+1 is a mana-hungry, late-game payoff stapled to a body that wants to attack on turn two; the card is deliberately split across the curve so that it earns its slot early and stays relevant once the lands pile up. This is Selesnya aggression distilled into an uncommon signpost: a cheap creature for the front half, an anthem-on-a-stick for the grindy back half, and a Plains-matters clause tying both halves to the white side of the deck. The friction is honest, too. Without white sources, both halves sit dormant: no Plains means a bare 1/1, and no white mana means the team-pump stays uncastable, leaving the card technically loaded but functionally inert. It rewards committing to the two-color plan rather than splashing into it, which is precisely what a color-pair signpost is supposed to do.
