Shining Armor

Flash is what separates this Equipment from the sorcery-speed gear it otherwise resembles. Most cheap Equipment attaches on a slow cast and asks you to spend the following turn declaring attackers with it; this one drops in during combat, snaps onto a Knight for free, and grants vigilance and two extra toughness at exactly the moment they matter. That turns it into a combat trick disguised as gear: ambush an attacker into a block it survives, or firm up a blocker's toughness before combat damage is dealt so it walks away instead of dying to a state-based check. The Knight requirement on that free attach is the fence that pays for the flexibility. Attach it any other way and you owe the equip cost like everything else, but the on-enter trigger only finds a Knight, which anchors the card to a tribal shell rather than letting any deck splash it as generic flash protection. The toughness-and-vigilance package is defensive by intent: +0/+2 does not push more damage through, it keeps a creature alive and lets it attack without surrendering the block back, the pattern white uses to grind an aggressive board into a stalemate it wins. It is a narrow tool built for a specific kind of go-wide Knight deck, but within that lane the instant-speed attach does work a sorcery-speed piece of equipment never could.