So, I bet that the d12 is getting kicked to the curb...

[Simia Saturnalia]

Based on the spined devil stat card, we can confirm the d4 is in!

Also the d6, but they're ubiquitous anyway.

 

[Badkarmaboy]

The d4? Aka the caltrop of pain? Try standing on one in socks or bare feet.

Or putting a number of heavy books on one (say hello to punctured cover on soft covered books).

My d4s look like d12's with roman numerals for 1-4. They roll great and lack the pointy-ness.