Cake: Place cake mix, water, eggs and oil in mixer bowl. Using a paddle, mix on low speed 30 seconds.
Scrape bowl and paddle. Mix on low speed 30 seconds.
Scale batter into four,* lightly greased or paper-lined, 9-inch round pans (23 oz batter each pan).
Bake in a convection oven at 300°F for 20-25 minutes. Cool completely.
Mousse: Place the heavy cream in a sauce pan and bring to just a boil. Pour over chocolate and gently whisk to incorporate.
Cool to room temperature.
Gently blend whipped cream in two stages. (Blend one-third of the whipped cream into the chocolate mixture to lighten; then gently fold in the remaining cream).
Chocolate Cocoa Butter Spray:
Temper chocolate.
Temper cocoa butter.
Pour tempered chocolate and tempered cocoa butter into paint sprayer.
Chocolate Orb Leaves: Temper chocolate and pour into 1/2 sphere molds.
Remove when set and assembled into whole spheres.
Using an off-set metal spatula spread chocolate on plastic sheet, resembling a leaf.
Set and assemble to the base of the chocolate orb.
To Assemble: Cut one cake in half, horizontally to make 2 layers.
For each cake, place one half of the cake in the base of a ring mold.
Pour 14 oz chocolate mousse evenly over cake, freeze until set.
Unmold cake and spray with chocolate cocoa butter mixture to create a velvet finish.
Garnish top of cake with the chocolate orb flower.
*NOTE: This will make four, 9-inch cakes. Use one, 9-inch cake to make two mousse cakes. Reserve and freeze the other three cakes for future use.