I believe a Feruchemist would be able to use other sources of investiture, since that's how compounding works, using allomancy as a fuel for feruchemy. And if you look up copper compounding, you will see that Brandon has been RAFOing that since 2015, but he has said it doesn't do nothing (as opposed to some other types of compounding like aluminum). It's possible that we might get a look into it during era 3, but I imagine that a copper feruchemist would have similar results feeding from a Perpendicularity as they would compounding. Whatever those results may be.
Oh correction 2012, this is the oldest WoB I can find on the subject, and says basically the most he has ever said about it
FireArcadia Is there any use to being a copper Compounder, from a Feruchemical point of view? I think the same point would also apply to an aluminum Compounder.
Brandon Sanderson Some combinations, like some abilities themselves, aren't really that useful. That said, being able to Compound copper...that could do some things. Aluminum, not so much.
I'm actually not sure we have any information on this. A feruchemist sort of requires a metalmind, and I am not entirely sure they can substitute other Investiture as a metalmind or not. This is a really interesting question and perhaps it should be brought up to Brandon at the next spoiler stream or livestream Q&A.
Cosmere
This community is a place to discuss books in Brandon Sanderson's Cosmere--the shared universe where most of his novels take place. Please take a moment to review our rules!
1. Show respect to others
Every interaction in the community must be kind, respectful, and welcoming. No person should ever feel threatened, harassed, or unwelcome. Do not engage in hate speech, harassment, insults, personal attacks, trolling, or arguing in bad faith. Interpretation of this rule is subject to the moderators' discretion. Please remember the human.
2. Spoilers not permitted in post titles
Post titles must never reveal spoilers. This includes no direct quotes from the books. Title wording should be vague if necessary. Grey areas are up to the moderators' discretion.
3. Use spoiler markup for all spoiler posts
Please cover all posts in a spoiler tag. Spoilers outside the scope of a post must be hidden with spoiler markup and the scope indicated. The scope is determined by the post tag flair along with any additional restrictions placed by the OP.
You spoiler tag like this:
::: Spoiler
Spoiler Tag
message here
:::
in order to get:
Book Name Here
Stuff about the book in here
4. Post must be tagged for spoilers
All posts must be tagged to indicate the level of expected spoilers in the link/post and comments. The spoiler scope should include the name of the book or books, such as [Book Name]
or [Book Series]
. You may also say [No Spoilers]
if you don't want any spoilers at all. Be as specific as possible. You can even say [Book Name Ch 34]
, for example.
5. No excessive reposting
Identical content may not be reposted within, by default, a two week period. This period may be adjusted at the moderators' discretion.
6. Posts must be on topic
Posts must be related to the Cosmere. Posts relating to sensitive topics (such as politics, religions, etc.) will be subject to greater scrutiny.. Meta discussions related to the community are generally permitted. Self promotion for money is disallowed. Art, podcasts, videos and other such actual content is allowed.
7. Respect intellectual property
Piracy and copyright infringement are strictly forbidden. With some exceptions, all content must comply with Dragonsteel's licensing and fanart policies. Artwork must be attributed and may not be posted against the artist's wishes. Fan art should be marked as [OC]
or credited to the original artist. If AI was used as a tool, please also mark the post [AI: Tool Used]
, for example [AI: Midjourney]
.
8. Leaked content is not permitted
Content which is released outside of Brandon Sanderson's wishes is not allowed under any circumstances. Pre-release content publicly released by Brandon, Dragonsteel Entertainment, or a publisher is okay if marked appropriately for spoilers.
9. Posts must be thoughtful and unique (Except Fri-Sun, PST)
Posts must provide original thoughts, questions, ideas, news, or interpretations of the books that can be discussed by the community.
Restricted content often includes: memes; images reminiscent of something in the books; AI-generated artwork; photos of books, bookshelves, merchandise; casting posts; photos of pets; etc. This content is not restricted in /c/brandonsanderson if you’d like to post there.