Combine ranch dressing, taco seasoning, and lime juice in a small bowl to create the southwest sauce.
Lay the tortillas on a flat surface and spread a portion of the sauce in the center of each.
Layer the shredded lettuce, chicken strips, black beans, corn, and diced tomatoes onto the tortillas.
Top with shredded cheddar cheese and chopped cilantro.
Fold the left and right sides of the tortilla inward by two inches.
Roll the tortilla tightly from the bottom edge towards the top.
Slice diagonally and serve immediately.