Zuko's unkillability should be utilized more in post canon. Every fire lord Zuko headcanon is all "poor Zuko, having to deal with so many assassination attempts, this boy is hanging on by a thread." But listen, my guy has already survived being burned, blown up, electrocuted, fought three agni kais, faced the Avatar numerous times. It becomes something of a meme in the FN that no one can kill the firelord so you shouldn't even try, Zuko ends up surviving increasingly elaborate and unlikely assassination attempts. He develops an immunity to poison after having been poisoned so many times. He's just like "huh, you thought THAT would kill me?" at this point.
#he IS holding by a thread. but it has more to do with the paperwork and tight schedule than the assassination attempts#they actually break the monotony a bit#atla
Firelord Zuko, after spending the entire day in diplomatic meetings with people he'd rather throw hands with and having to sign documents that make him want to punch something, upon being met with an assassin with a knife: FINALLY