Well, that solves the issue on defeating Demon Lord and I know that he survived from Nie Li attacks but I really dony know if he carry that Demon Stone alongside of him.
Meanwhile Nie Li was consumed by hatred and revenge for Step-father was 'killed' in front of his eyes, but after he defeated Demon Lord, his face kinda sad and regret at same time due he cant protect him from Demon Lord grasp.
@Maximum
His sword are very powerful but he cant used it as long as 'hostages' are around him and thats why he held back his attack at all, also he already know that Demon Lord much stronger back in Nether Realm and his current power cant beat him equally without his equipments