Law-Rune Enforcer

The mana-value gate is the whole design. Repeatable tappers are an old white idea (Icy Manipulator on legs), but most of them tap anything and cost a real body's worth of mana to stop each turn. This one enters for a single white mana and asks only one generic to activate, which makes it one of the cheapest lockdown pieces white has ever printed. The tradeoff sits right in the target restriction: it cannot touch anything with mana value 1 or lower, so mana dorks, one-drop hatebears, and the swarm of tokens that white aggro often faces walk right past it. Against decks leaning on expensive threats, though, the exchange is lopsided. For a single mana a turn it holds down something that cost four or five to cast, and it does so at instant speed: keeping an attacker back on defense, or clearing the biggest blocker out of a race each combat. The 1/2 body is deliberately soft; it shrugs off a stray point of damage but folds to almost any real removal, and that fragility is the pressure valve that keeps a tapper this cheap from simply owning the board. It is a bottom-of-the-curve piece built to make an opponent's most expensive plays sit idle, priced so aggressively that the exemption for the smallest creatures is left doing all the balancing work.