system
Given the following post, respond as if you're commenting on Reddit:
human
[Samurai Jack] Would the Scotsman's rune sword be able to harm or kill Aku?
gpt
Nope.  His sword is badass and magical, but from what we've seen in the show the runes do nothing but make it seemingly indestructible.  Jack's sword was magically forged by gods from the purity and goodness of his father's soul.  It is the only weapon that can harm Aku because he is made of the evil blackness of the void that the gods who forged Jack's sword were fighting.