Murk Strider

A Man-o'-War with a tax attached: instead of simply bouncing a creature on arrival, this one first demands you feed the graveyard from exile, dragging a banished card out of that limbo and dropping it into its owner's yard as the price of the tempo swing. Without anything already sitting in an opponent's exile, the trigger does nothing, so the 3/2 lands as a vanilla beater and the bounce evaporates. The body leans entirely on the Processor family's peculiar economy: Eldrazi that treated exile, ordinarily a one-way prison in this game, as a fuel tank to be drained back into board presence. Ingest and the various exile effects do the stocking; the Processors do the spending. When the reservoir is full, the value is real. Devoid does not cheapen any of this, since the card still wants blue mana to cast; making it colorless matters only for interactions on the other side, dodging protection-from-blue and color-hosers while feeding a colorless-matters shell. What defines the design is the hard prerequisite: the tempo is genuine, but it is borrowed against setup work done several turns earlier, and the creature is only as good as the exile pile behind it. That conditional structure is what makes the Processors read as a coherent subfamily rather than a scattering of bounce and drain effects: each one is a different meter draining the same shared tank.