The daggers' speed increased fivefold, nearing hypersonic speeds, and it amplified even more once Horteus enhanced the Life Wave with his Ego Wave.
A cultivator at the Second Realm of the Ego Eternal Path of Power could improve their Astral or Essence Wave with their Ego Wave. Typically, Essence Cultivators control the Life Wave to enhance their spells, while Astral Cultivators infuse their Ego Wave into their Astral Wave, pushing their bodily enhancements to the next level.
Cain normally didn't use either of those skills since he preferred to use his Ego Wave as fuel for the skills of his Alter-Ego. After all, Radiance of Life and Radiance of Strength offered a much more effective boost in battle power but consumed a tremendous amount of energy.