Brawler's Plate

The +2/+2 is the cheapest thing this Equipment does; the trample is what it was built to sell. A pure power-and-toughness buff runs into a structural wall in combat: a single chump blocker eats the whole attack no matter how large the equipped creature gets. Trample is the answer that converts a stat bonus into inevitable pressure, pushing every point over the blocker's toughness through as damage that lands on the player or planeswalker. That reframes the buff as a closer rather than a coin flip against a one-drop wall, best on a body that is already evasive or already large. The price structure tells the rest of the story: three to cast and four to equip is a deliberately heavy tax, the cost of a colorless, reusable buff that answers to no particular deck and can move to a new creature later. But moving it is not free and not automatic; if the wearer dies, the Plate stays on the battlefield and does nothing until you pay the equip cost again, at sorcery speed, to strap it onto a fresh body. That is the tension it resolves against a combat trick: the trick fires once, this keeps the +2/+2 and trample every turn, so long as you are willing to keep feeding it mana. Common-rarity, colorless, built to give a creature deck a recurring finisher rather than a flashy one, and the rate reflects exactly that modest ambition.