Preheat the oven to 350°F (175°C).
In a large mixing bowl, combine the shredded chicken, black beans, corn, enchilada sauce, diced tomatoes, cumin, chili powder, garlic powder, onion powder, salt, and pepper. Mix well.
In a greased 9x13-inch baking dish, layer half of the tortilla strips evenly across the bottom.
Spread half of the chicken mixture over the tortilla strips, followed by half of the shredded cheese.
Repeat the layers with the remaining tortilla strips, chicken mixture, and top with the remaining cheese.
Cover the baking dish with aluminum foil and bake for 25 minutes.
Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden.
Let the casserole cool for 5-10 minutes before serving. Top with sour cream and cilantro if desired.