Complex sentence: Vixen's connection to the "Red" is so deep that she can use the abilities of multiple animals at one time and has demonstrated the ability to hold onto the morphogenetic traits of all the animal in a forest.
Split into simpler sentences: Vixen's connection to the "Red" was so deep that she could use the abilities of multiple animals at one time. She demonstrated the ability to hold onto the morphogenetic traits of all the animal in a forest.