Joiner Adept

What this does that a mana rock cannot: it turns your entire manabase into a five-color filter at once, without spending the lands' production. Most fixing in green's history is incremental, one source at a time: a creature that taps for any color, an enchantment that fixes a single land, a dual-land cycle. This collapses all of that into one effect, granting every land you already control the ability to produce any color. The body is fragile and the rate is unhurried, which is the point: a permanent enchant-your-lands engine that happens to be a creature, so it dies to anything but works retroactively across every land you have and will draw. The payoff scales with greed, and that is what gives the card its shape. In a two-color deck it is a rounding error; reaching for a splash it is convenience; in a five-color shell it is the linchpin that lets off-color spells cast from any source. The cost of that ceiling is that the engine is gated behind a creature any opponent can kill, and behind your own willingness to build a board that wants this much color access in the first place. Among green's "fixing-as-a-creature" pieces it is the broadest: not a source, but a permission slip stamped onto every land you already control.