Using dragon crystals as fuel was not worth mentioning. Grand Duke Iron Blood had the backing of Dragon Island, which probably had a stockpile of dragon crystals so massive that it would make gods jealous. Furthermore, one dragon crystal could last countless level ten attacks.
The way dragon crystals stored energy was very different from magic nuclei. A piece of dragon crystal was hundreds of times more expensive than a magic nucleus of the same level.
The Grand Duke used various measures to break the enemy. He had the magic cannons suppress the enemies' defenses, before gathering the powerful ones and taking out the magic tower one after another.
None of the mages of Devil's Horn was able to take on the Cloudflow army without their towers. The Grand Duke's men were armed with formidable gear as well.
