Quantum towers

Quantum Towers are incredibly complex machines as tall as skyscrapers.The Monitor buried many of these machines across the multiverse on key Earths, in preparation for the crisis that would eventually hit the multiverse. A tower was buried on Earth-38 under what would become National City. These towers are powered by solar power and are capable of holding back the antimatter wave that the Monitor knew would eventually hit the multiverse. As they are powered by solar energy, they can be charged by Kryptonians who can use their heat vision to expel the solar energy they store and transfer it to the tower. Two Kryptonians were capable of charging the tower on Earth-38 after it lost power, albeit not to its full potential as the tower was only capable of slowing down the wave before it ultimately overwhelmed the planet after being charged by the aliens. It is possible that the towers can dissipate the antimatter wave entirely with enough time and energy but the one on Earth-38 was overwhelmed by the Anti-Monitor's army before it had the chance. It is unknown where other towers are present but it is possible one exists on Earth-1 due to it being the central junction for the entire multiverse and reportedly the last stopping point for the antimatter wave where the Monitor and his army of heroes will presumably make their final stand.