User blog comment:SoulRise99/Chapter 526: August is the REAL child of Zeref and Mavis; as well as the WEAKEST Mage in Alvarez!?/@comment-1153699-20170314020238

He's not weak to Holder-type Magic, he just can't copy and/or nullify it. Which means he's gonna have to just do it the old fashioned way.

That huge flame pillar thing he used against Natsu (which I, and many others, call "Melt") is easily enough to put someone like Lucy to sleep. She'd be lucky to still be alive, her and the rest of FT's shitty plot armor aside, of course. -_-