- Alex031097
- |
- Noble Member
Ok Op, allow me to answer this for you, since you seem to be referring to the film.
The mithril mail still allows the attack to happen, as shown in Moria, where is is impaled by the troll, however it does not actually would you.
However, the catch, I believe they are getting at with the spider, is that the attack still happened, and although the attack did not kill/wound Frodo, thanks to the mail, the stinger still went into him, where he was stabbed, and as such was able to release the poison.