This is perhaps one of my most treasured peices. I have taken it with me every time I visited a WA place on the astral and created a portal and placed it inside. It will allow ALL manner of WA only to come to you. If they are WA they will be allowed to traverse this portal. Plus if placed by your bed side it will begin to open you up for astral travel and third eye opening. This is the only one i have and don't know if I will get more as this was a treasured find in an antique store here in London.