Crystal Fog

In the map: "Seaside Story", there was this one area with crystals under the sea that had this fog that at any moment, forces you away from the area of the area when you are not with something that protects you from it. The fog was a bit scary, but it gave me a great idea. This i'll call: "Crystal Fog". With this, there will be an ocean biome that has crystals on the bottom floor that make crystal fog. The crystal fog will force you away unless if you have a certain item or block that forces the crystal fog away.