User blog comment:JoAlter/Invincible Iron Fist/@comment-27971189-20190815123425/@comment-25848535-20190815203342

Should i nickname him discount Kogoro Mouri? Lol.

It is "Next turn Own NP card becomes Buster", and it empties his NP gauge during initiation.

So if he has Memlin NP buffs, he could already be starting to refilling NP while his actions are locked.