Du You's skill advancement was partly stimulated by the advancement of his Summoned Creatures, and partly due to his own solid foundation, allowing him to advance two skills at once.
However, the two sisters didn't have such favorable conditions as Du You. The law power they absorbed during this period was only enough for them to advance one skill each.
Prior to this, both had already decided on the skills they wanted to advance. Lin Yucha chose Magic Gold Deadly Poison, which complements her Explosive Poison Snipe to strengthen its toxic effect.
She believed that after advancing this skill, her poison would be able to inflict significant damage on individuals of the same tier.
Yet, after the skill advancement, Du You was still surprised by the boost this skill provided.
