Hi I have been using DNDbeyond now for almost 2 years and I have loved recently I have gotten into homebrewing monsters and I had recently purchased Eberron Rising From the Last War on the site. What I had wanted to do was create a warforged colossus homebrew that could use elemental attacks, much to my chagrin I had found I would need to make it from scratch as it seems I cannot make homebrew monsters using my books that I had paid for on this site. I would completely understand if I was not allowed to publish this monster but I would like to have the colossus base stats so I do not have to type everything in manually and make sure it's accurate this is mostly a QOL suggestion.

You should be able to copy a monster to homebrew from, it could be a bug or still in development

I did try to copy it however it did not show up thus I made this thread

Yeah, you might want to post this on the bug sub forum

I was able to select warforged colossus. There is a bug that limits it to only free options when you mess with the creature type filter, that was probably the cause. Try again and leave that filter on "all."