The D36-2D6 is an amazing dual die.  The numbers on it show a result from 1 to 36.  The dots on each face show a 2D6 result (which has 36 possible outcomes) with the top dots showing the first D6 and the bottom dots showing the second D6.

Backers getting a D36-2D6 will receive PDF rules for two new magic items for 5E/DCC using the D36-2D6.

First magic item is the Goddess of Capricious Chance Fortuna's Pill of Wonderous Body Morphing which when swallowed can give a character a chaotic effect to their body ... (an Ogre's size?, a Giant's strength?, the speed of a wild cat? - no one will know until the die is rolled). 

The second magic item is the Nord Stone.  This allows a GM to have the D36-2D6 become a divining tool for a party.  Asking an NPC soothsayer to consult the Nords about the future.  Rolling the D36-2D6 twice will reveal a prophecy for the near future of possible beneficial or ominious events yet to come.  The die's future telling will be vague enough to allow GMs to have a lot of options to incorporate it into a future session.