<Chilled Rise>, <Surfing Frost>, <Cryobane Elevation>.
These three movement methods were all extremely expensive FFF+ skills, except for one, and the learning curve was undoubtedly steep. However, they all caught his attention for various reasons.
<Chilled Rise> worked by supercharging the air with frosty energy. The purpose was to force the hotter air to rise as a result, taking advantage to make his body lighter.
As one might expect, though, such a skill was incredibly difficult to control. For one, it was the hot energy that rose, not the frosty energy that was coating your body. That meant one had to take advantage of brief instants of time to piggyback off of the hotter air.
Such a thing sounded difficult even while explaining it so simply. But Sylas could see to a deeper layer.