# C. Robert Cargill on Reddit (u/Massawyrm)

Part of Creators on Reddit, researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-11-07. Interactive version: https://www.autumn.ai/resources/creators-on-reddit/c-robert-cargill

C. Robert Cargill: Novelist and screenwriter, Sinister and Doctor Strange.

- Reddit account: [u/Massawyrm](https://www.reddit.com/user/Massawyrm/) (Personal account)
- How we know it's theirs: [Their 2016 r/movies AMA, posted from this account](https://www.reddit.com/r/movies/comments/58bqh5/i_am_c_robert_cargill_screenwriter_of_sinister/)
- Where they post, in the records we retrieved: r/Warhammer40k (2506), r/DnD (753), r/Warhammer (729), r/writing (516), r/Screenwriting (408), r/marvelheroes (230)
- Known activity in the posts we found: 2010 to 2026
- Wikipedia: https://en.wikipedia.org/wiki/C._Robert_Cargill

## Moments

### u/Massawyrm in r/Warhammer, Jan 6, 2022 · Hobby

Replying to the post "GW Stiffed me on Srgt Castus".

> Hey brother, GW accidentally sent me two. It's an amazing model, but so distinct there would be no need to ever field two. DM me your addy and I'll pop my spare into the mail and get you straight.
>
> **EDIT:** Coordinates received. Sgt. Castus has been successfully deployed to a new warzone. Godspeed through the warp, Battle Brother.

Full thread: https://www.reddit.com/r/Warhammer/comments/rxmxt0/comment/hrjus5s/ · 494 points as of Nov 7, 2026

### u/Massawyrm in r/Screenwriting, Sep 7, 2019 · Advice

Replying to the post "Is 30 to late an age to attempt a career in screenwriting?".

> Sold my first script (SINISTER) at 35. So you'd have to fail for five years before selling something in order to be on the same track as someone who wrote a Marvel film.
>
> When ANYONE in Hollywood says they want a young writer, they mean cheap. You're good.

Full thread: https://www.reddit.com/r/Screenwriting/comments/d0r976/comment/ezcfvqd/ · 581 points as of Nov 7, 2026

### u/Massawyrm in r/Fantasy, Nov 16, 2016 · Advice

Replying to a redditor:

> If you could offer only one piece of advice to aspiring writers that isn't "just write" or "read more," what would it be?

> No one will ever know that your single perfect opening sentence was actually sentence 27, that you cut the first 26, and that you rewrote that sentence 19 more times. They also won't know that the amazing, profound sentence immediately after it was written once, without a single word ever being changed.

(Excerpt.)
Full thread: https://www.reddit.com/r/Fantasy/comments/5d91n9/comment/da3c7xb/ · 238 points as of Nov 7, 2026