Borrowed Magic book 3 - borrowed magic, #3

Long, long ago, in the kingdom of Perth there was a mage. That mages name was Bango Bonesong. He grew powerful, so much so that he attempted to cheat death. Some say he succeeded. But 7 years ago, he returned to light. Just letting you know, this isn't the "darkened mage comes back and tries to kill everyone and the hero has to stop him" story. To tell this story properly, you have to understand that there are borrowed artifacts.
To make a borrowed artifact, you must first conceal a magical creature specimen inside crystal. You must also understand that borrowed artifacts are linked in a web. That web circulated around the people they came from. Someone who would become a powerful lord mage discovered that this web could also cross time. And by modifying transportation magic a bit, you could use it to cross time. Back to the time the story takes place in, there is a half angel, half human cursed who has been teaching a young student mage how to use her powers.
This angel is from the future. Roughly 100 years from the current date. This being is instructing the young mage to create a mass rupture in time. To the point where Bango Bonesong was resurrected and swiftly defeated. But before that had happened, just a few weeks ago, there was a peace treaty about to be signed by every great power in Australia. This treaty was a magically binding borrowed artifact.
That would stop the governments from fighting. It went horribly wrong. The peace treaty didn't work, and a brawl ensued. An angel named Ava, some human siblings named Maggi and Ethos set off across the country to get home. But in Adelaide, it all went to hell. A woman named Kate forged a species called the Unidos. Fused human and borrowed artifact. Really powerful, really uncharted waters. We found our way to Perth with a man named Fatso.
A werewolf and a thief. 7 years ago, Bango was rampaging throughout Perth castle. To truly understand this story, you have to understand that I used to be called Bill. Bill was a powerful swordsman. And the son of a councilwoman and an arrogant ass. Upon injuring a Cursed, Bill's mind and soul slowly faded from his body being reborn as Ethos. The personality that came after him, but when Bill was 9, Bonesong was resurrected.