I wasn't happy with some of the other death whistles designs out there, so I combined the existing base whistle, with a skull from Tinkercad, and the results look pretty good!
The thicker2 version is even more modified with thicker & easier to print areas, where I found the print typically fails for me. I recommend using this version.
With the thicker2 version, I've been able to print tons of these at once, that all work, to give out on Halloween! ;)
The author remixed this model. Imported from Thingiverse.
I thickened up certain areas that typically didn't print right on the original model, as well as added a skull design available in Tinkercad to give it a spooky look.