I got in to the phase 3 beta but I have to work 12 hour shifts friday and saturday so I only had a couple hours to play late in the game. I was playing as a thaumaturge and I noticed on the couple spells I had there where numbers on them. When I used one the numbers would increase on that spell but decrease on my other ones. I also noticed that my with my fire spell, the number would increase and decrease significantly more than when I used my ice spell. Can anyone tell me what these numbers mean?