In a large skillet, heat the olive oil over medium heat. Add the shredded chicken, chili powder, cumin, garlic powder, onion powder, salt, and black pepper. Stir to combine and cook for about 5-7 minutes, until heated through and slightly crispy.
While the chicken is cooking, heat another skillet over medium heat. Place one corn tortilla in the skillet and warm for about 30 seconds on each side until pliable. Repeat with the remaining tortillas.
To assemble the tacos, place a generous amount of the crispy shredded chicken in the center of each tortilla. Top with shredded lettuce, diced tomatoes, and shredded cheese.
Add a dollop of sour cream and sprinkle with chopped cilantro. Serve with lime wedges on the side for squeezing over the tacos.