There’s this technique I’ve been trying out. I don’t know if it could be considered an Ice Shield but it helps me imagine the temperature in the area I’ve enclosed in the shield gradually get cooler.
Basically it is like creating a psiball at a distance but this time it is surrounding you and hollow. If you don’t know how to make a psiball, I’m sorry, I can’t help you with that.
Then you imagine the shield become ice; hear the cracking noise like when you add water to a glass of ice. Imagine your breath misting everytime you breathe out and actually feel the coolness around you. Keep at it for as long as you like. If you keep practicing, you will eventually start feeling the area get colder.
The energy shield doesn’t neccessarily have to be surrounding you but I found it easier to start with.
Hope this helps…
