Having Sex with enemy entity i.e., Enemy Humanoid Shape-shifting
1. Succubus thin long arrow tail,
2. Reptilian
and with a
3. Deceased human spirit.
What damages can occur to us how they affect us physically & spiritually ?

I would like to know this because there was a enemy humanoid succubus was attached to me for years and i was unaware.
And at present i'm dealing with these reptilians.
I wanna know & fix the damages that entity has done to me.

I sympathise with you, I've experienced a similar thing. From the consequences, I can assure you that if such sexual encounters take place on a frequent basis, you will experience the sensation of them slowly eating away at your soul every time. It will feel as if after each such encounter a piece of your soul is destroyed. It is very unpleasant. There will be outbursts of hatred towards Satan, bad moods. You won't be able to handle it on your own, they tear the aura of protection in a flash. The only way out is to ask the Guardian or Satan for help.