#cavernboxes

[thosecavernoussysboxes]

This [ noun ] does not want to be called "plural"

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

This [ noun ] is a Jason Todd fictive/introject

(Text background image credit: X )

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

This [ noun ] is often blurry, please be patient

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

This [ noun ] is fictive-heavy

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

This [ noun ] is anti-endo, please block and move on

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

Welcome !

Userbox/Sysbox account of @thosecactussharks

This blog will contain all of the userboxes and the occasional system terms that we make for ourselves and other CDD systems. This is strictly anti-endo, and we would ask that endos not interact and instead block this blog immediately. We will block if we see any endos that happen to land in our notifications.

We cannot stop endos from interacting, but we ask out of courtesy as we would prefer endos go to other endos for their userboxes instead of using ours.

Requests: Open

Read request guidelines carefully or we may not respond!

Userbox Masterlist [ X ]

DNI directly below the cut. We block freely.

DNI

NSFW blogs

Endos/willows/non-traumagenics

Radqueer/TransIDs

T.R.A.S.H.

Anti-good faith or contradictory labels

Anti furry, therian, otherkin, etc.

Anti pet regression and age regression

Pro-contact harmful para

Guidelines for Requests:

We will NOT make sysboxes that are:

Anything included in the DNI

Attacking Endos/willows/non-traumagenics (I do not, and will not, endorse harassment or threats)

Paranoia inducing content

Anything that could cause derealization, reality checking, or involves a general sense of unreality

NSFW

Personal information of any kind (please be safe on the internet, folks)

Yumeshipping or Selfshipping related (we are not well versed in the culture, so we are not comfortable handling these types of userboxes and would rather you go to someone else, thanks!)

Sign off boxes (these are more personal for us and we only make them for ourselves)

Request Info:

Tell us whether or not you want a blog to be mentioned in the post with an @, otherwise we will label the request as anonymous (we do not directly answer asks when doing userboxes to keep posts tidy)

Color and general theming. I would prefer you provide three colors (outline, text, and a color to overlay onto the image behind the text) but it is not required.

Text content of the box, including any variations you want (This User is, This system wants, This alter needs, etc.)

Images that you wish to use, if you have them. I would prefer you have an image for the image slot, and for the background of the text part of the userbox, but it's not required by any means.

You can also request new text to be added to old userboxes, in the case that there is a custom term that you would like us to add that we do not add by default.

Tagging system is as follows:

# Announcements - For any posts we make that are related to the blog as a whole or just anything we want to say without clogging up our userbox related tags

# Cavernboxes - The tag that we use on all userboxes and sysboxes for those who want to see posts of both types at the same time

# sysboxes - Userboxes directed specifically towards systems

# userboxes - General tag for any userboxes that aren't directly tied to systems or aren't using system-exclusive language

# CavernSysTerms- Any system terms that we have coined or created alternative definitions/names for, as well as any possible associated flags

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

Masterlist

Last Updated: 5/13/2026 [ Check back often for updates! There will not be notice for updates unless if there is other reason to announce it! ]

USERBOXES

∥ BOUNDARIES

× This [ noun ] is anti-endo, please block and move on [ X ]

∥ DISABILITIES / DISORDERS

General

× This [ noun ] is disabled [ X ]

AuDHD

× This [ noun ] is AuDHD [ X ]

∥ GENDER

Masculine

× This [ noun ] is transmasc [ X ]

SYSBOXES

∥ GENERAL

System Structure

× This [ noun ] is fictive-heavy [ X ]

Front Statuses

× This [ noun ] is often blurry, please be patient [ X ]

Preferences

× This [ noun ] does not want to be called "plural" [ X ]

∥ INTROJECTS

Jason Todd (DC)

× This [ noun ] is a Jason Todd fictive/introject [ X ]

[ This blog is anti-endo, please block and move on ]

[thosecavernoussysboxes]

This [ noun ] is AuDHD

These userboxes are completely free to use, please just read our pinned beforehand, like or reblog if you use them, and do not remove the watermark!

If you would like to request a userbox, please read our pinned post to see request availability and the guidelines we use before sending an ask! Otherwise, we may ignore or delete it to keep our inbox clutter-free!

[ This blog is anti-endo, please block and move on ]