Complex sentence: Apokolips is surprisingly the second most advanced planet (the first being New Genesis) in the universe with their technology the height of power in the universe and able to devastate galaxies when they are so inclined to use it.
Split into simpler sentences: Apokolips is surprisingly the second most advanced planet (the first being New Genesis) in the universe. With their technology, they are the height of power in the universe and are able to devastate galaxies when they are so inclined to use it.