Quest for the Holy Relic
A one-mana tutor that fetches any Equipment and attaches it for free, but priced in a currency you have to mint yourself: five creature spells cast, each one banking a quest counter on the enchantment. Those counters sit safely on the enchantment, not on your board, so a sweeper that wipes your creatures leaves the quest's progress intact; what it costs you is the bodies that were supposed to swing once the blade landed. That conversion rate is the whole bargain. The payoff scales with creature density, so the natural home is a wide, cheap aggressive shell that empties its hand fast, then cashes the quest into a game-ending weapon. Because the activated ability puts the Equipment directly onto the battlefield and attaches it in one motion, it skips the equip cost entirely, which is what makes the expensive top-end swords worth searching for: the ability pays the attach tax that would otherwise slow them down. There is a real tension in the build, too. Stuff the deck with bigger creatures and you reach the threshold slower; flood it with one-drops and the eventual Equipment has more bodies to ride but each one matters less. The card asks for a curve that produces volume without diluting the targets the blade is meant to carry. Read it as a slow-cooking ledger: it builds quietly across the early turns and pays out all at once, several turns later, the moment the fifth counter lands and the search resolves.
