@tips k because his body can handle the swordsmanship he mastered before he regressed if read other regression manhwa majority of em SHOWS that the power they had before regression ,after regression the body can't handle the sheer amount of force and muscles mass needed ,it also shows other regression prio had the power before regressed but this guy got the power after regression that's why he don't know or how to handle magic power INFACT nobody's want to teach a wingless fucker so he just learn swormanship so in my eyes it's not disappoint what disappointing is when the mc get used to the power in like 3 chapter that some bs