Complex sentence: Kerrigan and her allies are located in the nerve center, she has a personal chamber for altering her abilities, and there is an evolution pit where she can upgrade her units and perform evolution missions with the evolution master Abathur.
Split into simpler sentences: Kerrigan and her allies are located in the nerve center. She has a personal chamber for altering her abilities, and there is an evolution pit where she can upgrade her units and perform evolution missions with the evolution master Abathur.