Preheat the oven to 375 degrees and lightly grease a 9x13 baking dish.
In a large bowl, stir together the shredded chicken, black beans, 1/2 cup of the enchilada sauce, 1 cup of the cheddar cheese, cumin, and chili powder until evenly mixed.
Lay out four tortillas and divide the filling among them. Roll each one tightly and place seam side down in the baking dish.
Pour the remaining 1 cup of enchilada sauce over the rolled tortillas and sprinkle with the remaining 1 cup of cheddar cheese.
Cut the two remaining tortillas into thin strips. Lay the strips across the top of the enchiladas in a crisscross pattern to look like mummy bandages.
Bake for 20 to 25 minutes until the cheese is melted and the tortilla strips are lightly golden. Remove from the oven and let rest for 5 minutes.
Dab small dots of sour cream on each enchilada and press a black olive slice into each dot to create eyes.