From Blaseball Wiki

If you're at this page, you may have clicked a link that was intentionally created to look like it does not exist--a so-called "deadlink".

In other wikis, having dead links is considered messy and is typically frowned upon. On the Blaseball Wiki, tactical deployment of links to Wiki pages that don't exist is a method by which to imply hidden or cursed knowledge that cannot be allowed to exist. Depending on the context, this can create a comedic, mysterious, and/or sinister effect—all very useful when writing for the Blaseball universe. However, this technique should be used sparingly so as not to lose impact.

To add a fake deadlink to a page, consider using Template:Deadlink.