The general explanation of what a Servitor is, is that it is a concentrated thought form that is created to perform a certain task(s). Esoterically it is believed that thoughts can be concentrated to such a degree that these thoughts eventually become physically real. The explorer and writer Alexandra David-Néel for example wrote at great length about her encounters with thought forms in Tibet, which are called “Tulpa”, and how Tibetan monks were incredibly adept at creating these. She also writes how she was able to create one of these Tulpas herself after many months of effort and eventually this thought form became so solid that others in her expedition party were able to see it as well*.
In order to create a decently functioning Servitor, you do not need to spend months putting it together and certainly it does not need to be so powerful that others can see it.
For those that find it difficult to believe that thought-forms can be coalesced into such a power, that they can actually affect reality or be seen by other people, there is also a psychological explanation that might help. Some psychologists like to expound the theory that the human psyche can be seen of as made up of different parts; that is, what we consider to be a whole personality is actually a personality made up of a whole bunch of different sub-personalities working together. Since we seamlessly cycle from one part (sub-personality) of our whole personality to another, we do not notice that in actuality we are made of many different parts working together.
A Servitor then is sort of like a part that you are creating through the use of a ritual act. You either create a whole new sub-personality or you round up a few of these sub-personalities in order to manifest a new one that is well-suited to a particular purpose....Read More>>>...