Preheat your oven to 400°F (200°C).
In a large mixing bowl, combine the shredded chicken, black beans, corn, salsa, chili powder, cumin, garlic powder, onion powder, salt, and pepper. Mix well until all ingredients are evenly coated.
Warm the corn tortillas in a microwave for about 30 seconds to make them pliable.
Spoon the chicken mixture into each tortilla, then place them in a greased 9x13 inch baking dish.
Once all the tortillas are filled and arranged in the dish, sprinkle the shredded cheese evenly over the top.
Bake in the preheated oven for 15-20 minutes, or until the cheese is melted and bubbly.
Remove from the oven and let cool for a few minutes before serving. Top with sour cream and garnish with fresh cilantro.