User blog comment:B214/Volume 23 discussion blog/@comment-1884090-20170411154430/@comment-31137559-20170411190509

He should master the other four demonic swords before he tries to master Gram. You have to walk before you can run. It's very possible he can use his demonic power to master the swords and eliminate the curses. Vali used his demonic powers to prevent himself from going bersek in Juggernaut Drive and also used his demonic powers as a substitute for his life force.