The choice to make between [Void Walker] and [Lesser Cthulhu] was actually simple. From looking at the fact that [Lesser Cthulhu] provided more abilities, as well as the description of the abilities coming from a 'profoundly rare creature' across the universe, Noah chose this skill tree right away.
After using two of the few remaining SAINT+ skills he had worked hard to raise and combine in his last session in the Time Space, he felt the resonance of essence rumble within him once again as he synthesized yet another Void Rank Skill. He felt the explosion of something unknown inside of his origin as this upgrade brought about an even more profound sensation than when he advanced the skill tree of the Lich Emperor. Dwelling in the sensation for a bit, he opened the Skill Tree of the [Lesser Cthulhu] and observed the new additions.