Add the chicken, beans, corn, chicken broth, green chiles, onion, chili powder, cumin, oregano, garlic powder, salt and pepper to the slow cooker. WAIT TO ADD THE SOUR CREAM AND CILANTRO. Stir.
Place the lid on the slow cooker. Cook on HIGH for 4 hours or LOW for 8 hours.
When the cooking time is done, shred the chicken with two forks.