First, they started with Blackberry Kush, which is an Indica dominant hybrid created by combining Afghani & Blackberry which give it its dense beautiful buds.
The second strain that was used would be Diesel Maui Dog, this again is mostly an Indica strain chosen for its strong genetics and its relatively short flowering time.
Finally, last but by no means least, we have Royal Kush, one of Emerald Mountain's own strains. The Royal Kush strain was created from powerful genetics, Afghani no:1 adding a little height to the situation and Skunk #1, adding a little bit of a kick to the strain.
Finally, in the end, we are left with a beautiful powerhouse hybrid know today as Spice Cream.