Chime of Night

The trick is timing the aura's death rather than the creature's. The destroy clause does nothing while the enchantment sits on the battlefield: it grants no debuff, no Pacifism-style lock, no static restriction at all. The enchanted creature keeps doing its thing until the moment the aura hits the graveyard, at which point you destroy a nonblack creature of your choosing. That inverts the usual liability of an aura. Normally the two-for-one risk runs against you: an opponent kills the creature and your aura goes with it for nothing. Here the trip to the bin is the payoff, so the events that would punish you instead reward you. Bounce or wipe the enchanted creature, point your own Disenchant at the chime, or land it on a creature you control and feed that creature to a sacrifice outlet, and the destroy still resolves. The nonblack clause is the design discipline holding it in check: it never threatens your own black creatures and leaves a real gap against any deck running black, which keeps a self-cashing removal aura honest. The friction that remains is engineering the death rather than waiting for it: you have to commit a card to a creature, then arrange for the aura to die on your terms. As late-Urza's-block design, it reads as an experiment in auras that want to die, treating the graveyard as the trigger rather than the failure state. It reprices the standard aura risk into an upside, and the seam shows in how much setup the upside costs.