Was it the egregore or the servitor? 
In all honestly, they’re actually both very similar but created in different ways. @Artemisia’s definition from ChatGPT is pretty spot-on for my understanding of the spirit.
So, an egregore is a thought-form given life through group energy. Like Devenne said, some people have said that Jesus (or even other deities or spirits) is an egregore. They are created by groups putting enough energy into certain subjects or beliefs. There are even coven egregores; spirits are created through the coven meetings and energy raised. This egregore can then work with the coven and help in the same way an individual’s servitor can. The only difference between the two, I believe, is that an egregore isn’t given a job or role. It can be a sentient spirit with wants, desires, and dislikes outside the group who created it (even if the creation was accidental).
Servitors are created individually, given specific purposes and jobs, and can be “decomissioned” or “retired” when their job is done.