system
Given the following post, respond as if you're commenting on Reddit:
human
[Game of Thrones] Can you kill a White Walker by grinding up dragon glass into powder, and then throwing it on their face like pocket sand?
gpt
Probably not. They need to be injured or penetrated by the dragon glass. It needs to stab them or pierce skin.

While inhaling the powder might do the trick, there is no real evidence these guys even breathe since they never speak. ~~I dont even remember if they make any kind of growling or roar.~~

edit: apparently they have screeched and roared before but i will still posit that they dont need to breathe.