Harvester Druid

What the mana dork fixes here is itself: instead of producing a fixed color or filtering off a sacrificed permanent, this one reads your existing lands and hands back any color one of them could already make. The catch is the dependency: with only basics in play it produces nothing more useful than a Llanowar Elves stuck behind an extra mana of cost, since you can only echo colors your lands already supply. Where it earns its slot is the multicolor manabase that owns nonbasics tapping for two or three colors, dual-typed lands, or anything generating off-color mana; against that backdrop a single Druid suddenly funnels the whole rainbow through one creature. It is the rare accelerant whose value scales not with your spells but with the quality of your lands, which makes it a fixer for the deck that is already greedy rather than a fixer that lets a deck become greedy. That ordering matters: it cannot bootstrap a five-color build from nothing, it can only amplify one that has already done the manabase work. A 1/1 that converts a good manabase into a better one, no more and no less.