Together As One Supernatural Weapon

I really suck at descriptions, can someone help me?

There's ten rare beings, they all share a similar trait. That would be a skull mark on their right cheek. Signalling that they're not only alphas but half angel, half demon. They're scattered across the world but there's three on a tiny island named, Barbados. Two of them being twins, both of them being the strongest of the ten. Never have they once crossed paths with the third one till they got into secondary school. Only then did strange things started to happen around and to them.

Things become complicated and there's no way to explain it to anyone. Everyone has an important role in this. If its for good or for evil, they still matter. The darkest of evil has been risen once again. To cause chaos and destruction upon the world. It has just begun, cause with every twist and turn along their path. They realize there's more to this evil then what meets the eye. Perhaps they will find out an answer to a mystery they find along the way.

This evil has been around since this earth has come to be. The elders knows more about this evil than anyone else. For some reason they wouldn't say anything to help win against it. They seem afraid of something behind the evil itself.

"What is this evil?" U may ask but what's the fun in telling u? Y don't u read and find out~