Molt Tender

Two tap abilities on the same 1/1 body, both drawing from the graveyard but pulling in opposite directions: one feeds it, one burns it. Tap to self-mill and you are quietly stocking the yard on turns with nothing better to spend the activation on; tap and exile a card from that yard and you get one mana of any color. The mill builds the fuel, the fixing consumes it, and because both run off the same tap you never do both in a turn without an untapper. The any-color clause is the part that pays for the slot: most one-mana green producers are locked to green or a single color, while here the color is arbitrary, paid for by a resource the creature manufactures for itself. That makes the graveyard a working stockpile rather than a hoard, something spent down as you use it. The obvious homes are shells that want incidental self-mill and flexible mana from the same card without dedicating a slot to a one-note fixer: reanimator toolboxes, delirium and graveyard-count payoffs, greedy multicolor piles happy to trade a card off the top for a splash color. A quiet piece of dual-purpose design where the two halves are not really separate abilities at all, but the two ends of a single loop.