Coded question

I know this is a really narc question.. so I’ll try to use better terminology.. let’s say I’m in a game, this game is very realistic, say almost as real as life.z and I’m trying to find a wizard who has a shop, and this shop has a certain potion that takes me to another dimension and allows me to have profound visions and revelations.

What’s the most efficient way to find a wizard like this if I’m new to an area?