In a large bowl, combine shredded chicken, black beans, corn, green chiles, and half of the enchilada sauce. Mix thoroughly to coat every piece with flavor.
Spread half of the remaining enchilada sauce on the bottom of the casserole dish. Place half of the corn tortillas on top, cutting some if needed to cover the surface.
Spoon half of the chicken mixture over the tortilla layer. Make sure it spreads evenly to get flavor in every bite.
Layer the remaining tortillas over the chicken mixture. Add the rest of the chicken mixture on top, and pour any remaining enchilada sauce evenly.
Sprinkle shredded cheddar cheese generously over the top. Bake at 375°F (190°C) for 25-30 minutes until bubbly and golden.