Not much could be said about Rapid Frostburst. Apart from a greater burst of damage from being the strengthened version of Ice Burst -- dealing 20% of Jiang Fei's Health Points as damage instead of the original 10%, Rapid Frostburst's freeze had also been expanded from one second to three seconds!
Other than Rapid Frostburst, there was also newly learned Rose Cutter. The skill did not cause instantaneous damage. Instead, it gave off a continuous damage effect which was equivalent to 2% of Jiang Fei's maximum Health Points, for every second. Although it did not sound like a lot, Jiang Fei had lots of Health Points!
After reaching Level 40, Jiang Fei's Health Points had reached 37,000. That was equivalent to 700 damage per second! This continuous damage effect was as good as the damage over time that Magicians and Bandits could muster!