Brand Test Build 6 is posted, with lots of new bug fixes and balance tweaks. 
The link to the builds is, as always, in the main forum post about the test builds: http://forum.ferretdev.org/viewtopic.php?f=8&t=414
Enjoy, thanks for all the testing help, and good luck in the Tower!
Here’s another awesome piece of fan art by Zyalin, this one of one of the Tower’s Slimes! They don’t seem much like a mere Level 1 demon portrayed like this, do they? Thanks Zyalin!
Hey folks, just a quick update: I should have time to get some more bug fixes in and put out a new test build sometime next week. 
Thank you to everyone who has been reporting game results and giving me bug reports, they are a big help.
The link in the forum post has been updated. Lots of fixes in this one, so it’s worth a grab.
Forum post link: http://forum.ferretdev.org/viewtopic.php?f=8&t=414
The early part of the week’s been a bit slammed, but I hope to have the next Brand Test Build (with several good bug fixes!) out sometime in the next couple of days, before the weekend. This is good, because I’m almost certainly going to be playing Sekiro: Shadows Die Twice this weekend, with apologies to Demon’s fans. Cheers!
While we wait for me to finish the next Brand Test Build, which will include several bug fixes and quality of life improvements, here’s another piece of awesome art by Zyalin, this piece depicting how it might look if you teach Headless how to Polar Rush.
If you want to see more of Zyalin’s awesome art, check out his Instagram: https://www.instagram.com/zyalin_art/
Thanks again Zyalin!
This one should fix all the funny hang bugs related to getting to 0 or less MaxHP due to Fusion, Soul Armor, or Brand related changes in Vitality/MaxHP, as well as a couple of other bugs.
Download link in the forum post has been updated: http://forum.ferretdev.org/viewtopic.php?f=8&t=414
Note: Forgot to post it in the change log, but in a related matter, leveling up Vitality no longer previews changes to your MaxHP in real time. (I may be able to fix this later, but wasn’t worth delaying critical fixes for. Previewing things is the worst UI. 
)
Working on Test Build 4 now, which is mainly to fix various bugs related to Brands, Soul Armor, and Fusion reducing MaxHP to below 0.
This will probably be the pattern during the Brand Testing: critical bugs will be fixed on weeknights (most likely Mondays or Wednesdays), with most other work happening over weekends.
I’ll post again when Test Build 4 is ready, which should hopefully be later tonight.
Found another crasher that needed fixing, this one related to brands with an SP penalty modifier applying that modifier even to things that should never have had SP costs, like basic movement and passing. This eventually caused AIs to be completely unable to do anything, which is a big no-no.
Thanks to wizzzargh and SummerSnowman for the help with this one.
Build link in the forum post has been updated to point to Brand Test 3: http://forum.ferretdev.org/viewtopic.php?f=8&t=414
Brand Test Build 2 has been posted, which fixes the freeze that would sometimes occur when a Relic Wraith spawned.
Here’s another link to the forum post describing the test and containing a link to the download: http://forum.ferretdev.org/viewtopic.php?f=8&t=414
Thanks to Zyalin for helping me track that bug down and fix it quickly