Pharynx's transformation had changed more than his appearance: he had gained a new appreciation for ponies and the love and friendship they had. So when word of Chrysalis' return reached the hive, no one was surprised to see Pharynx readily agree to lead the hive's army into battle to help save Equestria. After all, ponies were Pharynx's friends now!
And while that was true enough, none of them knew that Pharynx had another reason to do so... a much more important one.
Cover art by me: click here
Edit 22 Jan 2021: Now with Youtube reading by CitreneSkys! She did it for practice and it turned out pretty good. She's also got some good stories of her own, so check her out if you haven't already.