Your welcome it's a pleasure ! i have a lot to practice lol but thank you ! Your french seems also quite good ! i'm sure !
i think it's the meditation that allowed you to see the shadows, well done !
I have other informations too about them if you want :
They can put some sort of astral imlpant or devices on your astral body, which causes a lot of problems like energy blockages, negative emotions, negative behavior, false beliefs, pain etc and all this becomes a cycle that never ends.
Majority of people are controlled by them in secret, but a few people are very positive and they cannot be implanted.
If they are confronted to your positive emotions and your positivity, they are burning and can even die.
In other words we are like a big farm to them, they don't care about us at all, we are like batteries
they are putting all their negative stuff on us including doubt. that is the central point : they transform our positive energy to a negative energy they can use for themselves.
They are doing all thei best to keep us away from our true self and higher self.
David Icke writed lot of books about them, Phantom Self is the best book that regroups all the what is important about Archons and how to free yourlself from them and a lot more.
As you guessed it is possible to get rid of it and them and implants.
There are hypnosis sessions that can help people to get rid of all that stuff. but there are also other methods of course.
You can search on google.
The more positive you are the more they are in trouble.
I hope it can help you