I know one can get an indulgence today. The Pope issued a general one earlier last year for those who expressed special devotion to Mary.
No, what initiated the separation was that they wanted to KILL Luther. Dead. He had to go into hiding. As he was in hiding he immersed himself in God's word and that made the break permanent. The just shall live by faith. Understanding this, Luther could not go back to the church even if they would have allowed him. His initial desire though was to reform the church. He was a very pious monk. The best of monks. Too good as a matter of fact for his confessor began to be a little impatient with his zealousness for confession.
Luther did not "create" a religion to support an immoral lifestyle. He was a moral man and a good monk. He saw in Scripture the opposite of what the church was teaching and it made the break final.
Wow. I just posted that to you.
Luther's hagiography is very touching, but it has nothing to do with the theologies of the four solas, which separate us today.
At least he survived. Lucaris was strangled.