What's the Name of That Book??? discussion

It's a book about a race call blood born or the other. The cover was green? With the main character was a man and his we're hands covered in fire. Whenever the race used their power it consumed them. There were tree fairys involved. (spolier: he befriends one by using a old custom)

When did you read it?

Was the book for adults?

OP (original poster) account is deleted. Moving to the "Now we'll never know" folder.