Manna or Mana is the food sent down by God to do all sorts of things for the people, not just as food. This was also a supernatural substance that gave energy and power of biblical magic. Biblical magic is pretty darn impressive too!
The piece you are looking at holds Manna in Lucite and the energy of it heats up and passes to you for all sorts of magical deeds. These deeds are all white light of course. Each person will react differently to it but all of it being good. This also will help with dieting, magical power including psychic ability and even protection. This is an all-around paranormal piece.