Complex sentence: When she briefly regained her full memories, she transformed into a horned demonic form with greatly increased power levels and greater control over those powers; in this she manifested incredible teleportation abilities, matter transformation and the opening of dimensional gates.
Split into simpler sentences: When she briefly regained her full memories, she transformed into a horned demonic form with greatly increased power levels and greater control over those powers. In this form, she also manifested incredible teleportation abilities, matter transformation and the opening of dimensional gates.