13 Most Powerful Items In The DC Cinematic Universe
2. The World Engine
Terraforming is no easy feat (or we'd all have moved to Mars already), so General Zod's giant atmosphere changing machine from Man Of Steel deserve to be appreciated for their insane power. They can literally reverse ecological evolution to the benefit of their commanders and change atmospheres to pre-programmed specifications.
Even before Superman was able to stop the Engine, it managed to destroy a significant portion of the Earth, and probably killed all of the fish in the Indian Ocean, but luckily the effects had all sort of gone away by the time Batman v Superman rolled around. But had it been allowed to finish their grim agenda, the Engine would have killed all life on Earth.
It beats the weird Enchantress machine only on account of it not really needing a pilot to sexily dance around to make it work.