Preheat your oven to 350°F (175°C).
In a bowl, mix the shredded chicken, sour cream, cream of chicken soup, green chilies, garlic powder, salt, and pepper.
Warm the tortillas in a skillet until soft, about 30 seconds on each side.
Spoon the chicken mixture onto each tortilla and roll them up tightly.
Place the rolled tortillas seam-side down in a greased baking dish.
Pour any remaining chicken mixture over the top of the enchiladas.
Sprinkle shredded Monterey Jack cheese evenly over the top.
Cover with aluminum foil and bake for 20 minutes.
Remove the foil and bake for an additional 5 minutes until the cheese is bubbly and golden.
Garnish with fresh cilantro before serving.