
The symbol of Satan lures Satanists into gathering and satanic holiday and ritual preserve the gathering.
What symbol of Satan?
You mean the one that came from 19th century hermeticism and eventually hijacked by a carnie who slapped some Hebrew letters on it and copyrighted it in 1966?
What is an ancient symbol for Satan? All current symbols stem from Levi and various Knights of things. Very gnostic abrahamic religion, all of them.
Here's an ancient Satan symbol, maybe:

Chai is the Hebrew word for living or alive. The word also has a third meaning: eighteen. This is because the letters that spell the word – het and yud – are the eighth and tenth letters of the Hebrew alphabet, respectively. A symbol worn on necklaces and other types of jewelry, its meaning is tied to the number it represents; there are stories of the number eighteen and its multiples being good luck
But it's totally 18, and if you use the Numerology it's a divine 6+6+6 thing with the sacred geometry or something.
So esometerically it's more than just just a cooler version of the Star of David.
Anyway. Done trolling, this thread may now return to retard ouroboros.