Right. Just like anything else, we have to make sure to use it responsibly. I think it's the same way here. The crystals don't possess limitless power.

[And now they know just how they have to be recharged. All the more reason to be careful.]

My friends from Fairy Tail ended up fighting and defeating him. His son, the prince, took the throne to start rebuilding the country. Edolas' magic is gone for good, but the people there will learn to live without it. No one needs magic to live - all people need is each other.