Komik Martial Master

In the year 2030,a strange threat hit the earth,no one knows where it came from or why it came to earth. What we know for sure was that it was dangerous and all our attacks were in vain, no earth weapons could give them a scratch, guns,jet fighters and other weapons,no of the weapons gave them a scratch. They called themselves zendras(halve dragon and human)they are faster,stronger and they regenerate faster. All hopes were fallen,humans were taken away as prisoners,we thought that was the end,until earth was given a second chance. Unknown green crystals was found in a cave,it was mined and it was discovered to have supernatural power levels.it was condensed in a book and was given to the people and military to master,since then humans were able to fight back but that was just the beginning.