In my journeys, I've come across all types of altars.
My question, however, centers on a certain type. An "altar to the living", as I see it.
The ones I've seen are used to bring luck, fortune, etc, to whom it's dedicated to.
So, my question is, are these altar legit? Could you build an altar to anyone you choose, and bring them good will or harm?
Which magical path allows you to do this?
I hope I don't sound ignorant. I'm just looking for information, in hopes to protect me from the ones who are.
Thank you in advance.