Aether Meltdown

The flash makes this a combat trick disguised as an Aura. -4/-0 doesn't kill anything, which is the constraint that pays for the cheap rate: it neutralizes a single attacker for the duration of the game rather than removing it from the board. The instant-speed window is where the design earns its keep. You hold it until an opponent commits to an alpha strike or shoves their best beater into a profitable attack, then flash it down to blank that creature's offense and turn a planned blowout into a whiff. Against a lone fattie, four power siphoned off is often the difference between taking a lethal swing and shrugging it off, and the enchanted creature stays a defensive zero on the next turn too. The two energy counters are a quiet rider, a deliberate nudge toward the energy payoffs of its era; on their own they do nothing, but they feed engines that convert stored energy into card advantage or damage, so a tempo-saving play also banks fuel for later. What it cannot do is matter against decks that win without attacking, and it leaves the body alive to chump or crew elsewhere. That softness is the point: this is a tempo card that buys turns, not an answer that ends threats.