Preheat oven to 350 F.
Mix chicken, sour cream, black beans, salsa, corn, cilantro and spices in a large bowl. Taste and adjust seasoning to your preference.
Cut tortillas in half with kitchen shears.
In a 9x13 dish, scoop ⅓ of the chicken mixture into bottom of pan. Spread evenly.
Place one layer of cut tortillas (about 4 tortillas) on chicken mixture to cover.
Top with ⅓ of the amount of shredded cheese.
Repeat with chicken mixture, tortillas, shredded cheese two more times. There should be three layers total.
Bake in oven for 20-25 minutes or until cheese is bubbly and casserole is warmed through.
Serve with sour cream and additional chopped cilantro.