system
A chat on 4chan
human
Do they work and if so do they need some blessing to do so?
gpt
Worked for me.
But I also drew a Hamsa on paper and hung that on my wall when I lost my old one and that seems to work just as well.

If I had to guess a 'God's Eye' would work too.
I think for magical effects, it matters less the exact form and more intention, personal symbolic meaning, and invested effort.

If snakes mean vivacious renewal because of shedding skin, and protection from vermin and therefore from spoilage of food and disease, and I spend a month carving and painting a snake out of wood to protect me, it's going to be more effective than any dreamcatcher made in a factory and bought, no matter how authentic or perfect it's construction.