Avacyn's Collar

Most Equipment is sold on persistence: it survives the death of its bearer, so the value carries forward to the next creature you draw. This one inverts the pitch, leaning into the death rather than insuring against it. The +1/+0 and vigilance are the kind of marginal combat boost any white aggressive deck wants, but the death trigger is where the card's whole strategic axis lives. Every Human you equip carries a built-in tribute clause: trade it in combat, lose it to spot removal, sacrifice it to your own engine, and you collect a 1/1 flier you never spent a card on. That reframes the math on attacking into open mana, since the defender either eats the Human and hands you a Spirit, or lets the boosted body through. The conditional matters more than the keyword. Strip the Human clause and this is generic stat-padding gear; with it, the Equipment becomes a payoff for committing to a creature type rather than just a power-and-toughness line, asking you to build a board of Humans you are happy to lose. The flavor underwrites the design cleanly, the angel's blessing manifesting as a flying soul when one of her faithful falls, but the mechanical point stands without it.