Combine chicken, cilantro, black beans, chilies, and seasonings in a bowl. Blend well.
In a lightly greased 11x4 pan, spread 1/2 of the enchilada sauce on the bottom of the pan. Top with 4 tortillas. It's okay if the tortillas overlap. Spread 1/2 of the chicken mixture over the tortillas. Top with 1 cup of the cheese and 1/2 of the sour cream. Repeat layers except for the remaining cheese and sour cream.
Cover casserole with tin foil and bake in a preheated 350 degree oven for 30 minutes. Remove cover and top with remaining cheese and dot top of the cheese with remaining sour cream. Place back in oven for 5 to 10 minutes until the cheese has melted.
Remove from oven and let sit 10 minutes before serving.