Roving Harper

The cantrip stapled to a body, rendered in its most unadorned white form. Elvish Visionary set the template for this effect in green: a small creature that replaces itself the instant it lands, converting a card in hand into a card in hand plus a warm body on the battlefield. White has historically had a harder time manufacturing raw card advantage, so an entry trigger that reads exactly like the green original is more notable in this color than the plain 2/2 for suggests. That statline is deliberately forgettable, and it is meant to be; nobody plays this to attack. What matters is that the draw keys on entering rather than casting. Anything that flickers, reanimates, or bounces and recasts it turns the creature into a repeatable source of cards, and any effect that copies it duplicates the trigger too. The body is just enough to trade into a token or gum up a one-drop, while the actual function is smoothing a hand and feeding whatever ecosystem cares about creatures leaving and re-entering play. As filler goes, this is the honest sort: a replacement-level statline that keeps a deck's gears turning without demanding a card be spent to do it, quiet work rather than a game-swinging swing.