The "White Sail Swordsmanship," originally derived from ship combat skills VS the "Sessi Scimitar Technique," widely spread among pirates by the Black Wing Order.
Battle on the ship deck is precisely the domain both swordsmanship practitioners excel in.
However.
The seemingly even situation at this moment is actually the result of Aiven having secretly activated the "Wild Talisman" to enhance his agility attribute by twenty percent, combined with the cooperation of extraordinary swordsmanship at a higher proficiency level than his opponent.
In the past half year, with continuous study of the Rose Sword Saint's swordsmanship and numerous death-defying battles, his progress has been even greater than when he was sparring with the Princess. If we subdivided the "Mastery" level of this swordsmanship, Aiven's progress has reached 70%, while Iron Bone William's might be only 50%.