Shu Cavalry

Horsemanship is fear in white clothing: an evasion keyword built so that almost nothing in the game can block it, because the only creatures that share the ability live in the same Asian-themed corner of the multiverse where horsemanship was the local flavor. In practice that makes this 2/2 functionally unblockable, a clean beater that gets in for damage turn after turn against any deck not packing its own cavalry. The design logic is the same trick that makes Invisible Stalker or a pumped flier so frustrating: the defending player needs a specific answer they almost certainly do not have, so the only real interaction is removal or a chump that does not exist. What separates horsemanship from generic unblockability is that it was a closed loop by intent. The set of creatures that can interact with it is tiny and self-contained, so unlike flying or even fear (which still has to thread past the artifact creatures and black creatures that can wall it), this evasion was a genuine factor within its environment and effectively absolute outside it. That isolation is also why the keyword never spread: an evasion that nothing answers makes for a fine curiosity in a self-contained block but a balance headache anywhere it brushes up against the wider card pool. As a body, this is a French vanilla white three-drop whose entire reason to exist is the word on the second line.