These are two of the skull/vertebrae/ribcage/tusk type files from my RPG Tools set of files. I'm putting them out for people to print on their own for free (but not for resale).
You'll want to use supports, and possibly tilt the demonic one at an angle to ensure it comes out.
http://www.rpgtools.org has other files, but not free.
| Demonic_Skull_with_spiked_vertebrae_-_print_at_angle_w_supports.stl | 2.3MB | |
| F128_Quad_Skull_and_Vertebrae_Pillar_A_v01.stl | 6.2MB |
