Butter a 9 x 13 inch baking dish. Lay the crescent rolls out on a large cutting board; fill each crescent roll triangle with 1 Tbsp. blueberries and roll up. Place in the pan.
Melt butter, then add sugar, cinnamon and cardmom and barely stir. Add vanilla, stir once or twice, then pour the entire mixture over the rolls/bluberries in the pan.
Pour ¾ of the can of Sprite around the edges and in the middle of the pan. Sprinkle with cinnamon and bake at 350 degrees for 35 minutes. Remove from the oven and let sit 10 minutes before serving.
Serve with ice cream or whipped cream, and spoon some of the sweet sauces from the pan over the top or vanilla ice cream.