The next morning after Kahn awoke from his sleep, he started his weapons training again. Recently, he didn't have enough time to practice but it clearly hadn't skipped his mind.
No matter how the blessings from the War Deity helped him raise his mastery and perfect his techniques easily, he'd still get rusty if he didn't practice with them in routines. Only a fool would get complacent with their cheat codes and forget to even train the basics of the fighting skills.
The story progression from here will be fast. So be prepared.