As for the Source Divine Skills, it's rather complicated.
At the time of the land's doom, Qi Yuan faced nearly three thousand elders, witnessing all sorts of Source Divine Skills.
Every Source Divine Skill is based on the Origin and follows its own path.
Some Source Divine Skills are weak, while others are strong.
Naturally, Qi Yuan doesn't want his Source Divine Skill to be too weak when he reaches level 120.
He will carefully consider the path of the Source Divine Skills.
Returning from the game world, only part of his cultivation was restored to his physical form.
However, his skills were still retained.
Skills like Heaven-Extinguishing Sword Technique, Death's Brilliance, and Overbearing Strength are actually Divine Skills that can only be used in the Nascent Soul Stage.
Qi Yuan can use them during the Foundation Establishment Stage allowing him to quickly kill in face of Nascent Soul, the reason for which lies in this.