Gallant Citizen

The hybrid mana is the whole trick. A 1/1 that replaces itself has been a common-rarity staple for a long stretch of the game's history, always cast for a fixed color; casting it off any combination of green or white sources means it slots into either half of a GW deck without asking the manabase for anything specific. That flexibility is the actual selling point, not the body. Elvish Visionary sits in the same lineage, a small green creature that trades its stats for a card the moment it lands, and this card runs the same enters-the-battlefield trigger while widening the color requirement so a mono-white or mono-green shell can still play it as a two-drop cantrip on legs. The 1/1 is deliberately negligible: the card is bought and paid for as a card-neutral body, a chump blocker that already returned its investment, or a creature to feed something hungry after the draw has already resolved. It asks nothing and promises little beyond keeping your hand full, which is exactly the job a floor-level value creature is designed to do.