Samite Herbalist

Every incremental engine has a cost of admission: pay mana, sacrifice a body, exile something from your graveyard. This one asks only that you tap, and combat handles that for free. Send the 2/1 into the red zone and you bank a life and a scry every turn without spending anything you weren't already spending. Vigilance would be dead weight here, since the tap is the whole point, and any other reason to tap your own creatures (crewing a Vehicle, convoke, activated abilities that cost a tap) buys another scry on top. The life is the smaller half. A single point rarely swings a game, but filtering the top card of your library each turn is the kind of advantage that accrues quietly, smoothing your draws while the Cleric keeps swinging. It sits in white's long line of small clerics that pair marginal lifegain with a second, more useful effect, but hanging the trigger on the tap event rather than on entering the battlefield or an activated cost is what turns a one-time perk into a recurring one. The 2/1 body keeps the whole thing modest: it trades down to almost any removal and can't hold the ground the turn it swings, so the value only flows while it's alive and pointed forward.