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Actually, when it comes to speed,
the max level Rainbow Transformation Skill isn't much faster than Sword Flight.
The speed of the Rainbow Transformation Skill can reach a bit over a hundred meters per second, and although Sword Flight is somewhat slower, it can still reach fifty to sixty meters per second. It's barely twice as fast. However, Sword Flight consumes spiritual power far too much.
With his Foundation Establishment at the third level, he could only sustain flight for a maximum of two hours.
On the other hand, although the duration of the spell for the Rainbow Transformation Skill is only about half an hour, its low consumption means that with his current cultivation, he could cast it consecutively fifteen times, equivalent to flying non-stop for about eight or nine hours in one go.
Furthermore, with the automatic recovery of mana by the max-level Longevity Skill during such a long duration,
