Complex sentence: Rex's E.V.O. powers come in the form of "builds" a variety of machine enhancements his nanites can generate seemingly out of thin air: he uses these for offense, defense, as well as transportation.
Split into simpler sentences: Rex's E.V.O. powers come in the form of "builds" a variety of machine enhancements his nanites can generate seemingly out of thin air. He uses these for offense, defense, as well as transportation.