In advance, roll out cookie dough and use patterns to cut 4 front legs, 3 large spikes, 2 each: back legs, heads, tails, wings and 1 arm.
Tint remaining dough violet, roll out and cut 11 small spikes and 4 each: large and medium spikes.
Sprinkle spikes with lavender sugar. Bake and cool all cookies.
Attach a 4 in. lollipop stick to front wing cookie with melted Candy Melts®. Let dry.
Bake and cool cake; position on cake board. For a 3-D effect on cake, sandwich duplicate front leg, back leg, head and tail cookie pieces with icing; position on cake.
Ice eyes, nose and mouth smooth with spatula. Pipe lines on chest and belly with tip 45.
Randomly pipe tip 16 dark green star spots on dragon; cover remainder of dragon with tip 16 light green stars.
Use tip 16 to overpipe stars on muzzle, back legs and eyebrows. Cover both wings with tip 16 stars.
Position back wing and insert front wing in cake. Prop up front wing with 3 plain large spike cookies, securing with icing.
Prop up front wing with 3 plain large spike cookies, securing with icing. Position arm and cover with tip 16 stars. Position spikes on cake.
**Note: Combine Lemon Yellow and Golden Yellow for yellow shown. Combine Leaf Green and Lemon Yellow for dark green shown. Use Kelly Green alone for light green shown. Combine Violet and Rose for violet shown.