I can't find the manhwa

So I've been looking everywhere for this action manhwa that I was reading 3 weeks ago, I thought I saved it but I guess not. It's about this guy who was the only one left at the tower, his comrades died and everyone else used a regression stone. When he reached the end of the tower he met this lion like demon asking him to make a contract with the death God but the guy said no and after a long time killed the demon? I left off where he was being fished by another God's follower and he came out naked. He also absorbed that God and had the only follower of the God become his follower. The guy went to this place and he saw his friend that he thought died in the tower. Now, he is trying to save his friend and his doing all that naked. Please help me find it, I'm trying to re-read it