SpikeBall

It's basically a simple design, really -- an icosahedron mixed with an icosidodecahedron. Mainly done as a lark for a desktop bauble.

It needs supports from the build plate, as there are some overhangs in three spots that will cause problems otherwise, but it can print at any size.

This one is BIG. Just the right size for the head of a mace. Feel free to adjust the size to your tastes and desire to use up filament.