Hi just wanted to post this :P It tells what the corrupted Ashbringer says on a chance on hit. Maybe there is some clues here?
http://youtube.com/watch?v=n1FvVwvaQtE
The ashbringer says:
1. I was pure once.
2. Fought for righteousness.
3. I was called Ashbringer.
4. Betrayed by my order.
5. Destroyed by Kel'Thuzad.
6. Suffer pain to serve.
7. My son watched me die.
8. Crusades fed his rage.
9. Truth is unknown to him.
10. Scarlet Crusade is pure no longer.
11. Balnazzar's crusade corrupted my son.
12. Kill them all!