Creatures Caves

Seconding a toxic-hybrid run. I got really invested in one Toxic/nontoxic Norn world after one of the descendants hatched with a Grendel Head...but also unfortunately presented with heart failure from the moment of birth. Thankfully it seemed that whatever initial concentration of toxin that was causing it ran out before her heart totally failed, so she spent much of her (shortened) life with about 7% or less of heart function, spreading her genes around and introducing plenty of Grendel heads into the population. And plenty of defective hearts, but oh well.

(Sadly as that screenshot shows, this same world developed a widespread mutation in which the Norns' instincts changed, and they would run away in fear of other Norns instead of a hypothetical Grendel. Cue 90% of the population spending their entire lives cowering in the corners of the Meso, occasionally stopping to kisspop into the crowd and perpetuate this mutation. Not much fun to watch.)

I think you might get some interesting stuff from a large aquatic world, too, especially one that mixes genomes/bodydata that don't usually mix well together, but I haven't experimented with that as much. In my latest attempt, in which I threw in as many aquatic breeds as I could find, I got the following...

* A pair of Banshee Hydrolisks punching everything they saw to death, which to be fair is exactly what they're supposed to do, but it just surprised me how vicious they are.
* Ettins dying out rather quickly, probably because of the above.
* This half-Coral Chichi half-Reef Glider(?) guy who lived a perfectly healthy life swimming around, he just happened look hilarious while doing so.
* Several other hybrids with floating heads or shoulders pinned up near their ears.

Your personal tastes will likely vary from mine, mainly in regards to nonviable offspring and weird body part disconnects. If you'd rather have a more stable population, being more selective about which breeds are added in should help. (I broke the cardinal rule of Colortrues, and it resulted in a lot of nonviable offspring.) Still, if you're looking for pure strangeness, it might be worth giving a test run.

At the moment I'm trying to see if I can get anything interesting out of non-toxic breeds in a bacteria-infested world, but so far none of them really have any noteworthy mutations aside from Grendel arms. Kind of unfortunate - a Spam Norn test run I did in a sterile world had a Variant-based mutation that I suspect would have stopped Cyanide from directly attacking Energy, and I was hoping these random Norns would get something similar.