Blood Servitor

A colorless 2/2 whose whole value proposition sits in what it leaves behind: a Blood token, the flavor of filtering that costs a mana, the tap, and a discarded card to convert into a fresh draw. The body asks nothing of you and does very little on its own; the interesting structural work is the deferred velocity. A dead board slot becomes rummaging on layaway, the kind of low-commitment card selection that graveyard decks and cost-reduction shells lean on to keep gas flowing without paying full freight for a cantrip. The Blood is not raw advantage. It routes fuel: it pushes the card you least want into the yard while pulling something newer off the top, and it only pays out later, at your discretion. What makes this a genuinely colorless design rather than a red one is that self-sufficiency: any shell can run it, and the token folds neatly into whatever already cares about artifacts entering, sacrifice fodder, or cards reaching the graveyard. Strip those hooks away and it reverts to a slow 2/2 with a rummage stapled on, which is exactly why the ETB trigger, not the creature, carries the pitch. The design is built to be worth a little, reliably, in the widest possible range of decks.