The measure of your skill with abjuration magic and your ability to protect yourself using the life well.
0: You have no specific skill with protection magics.
1: You can manipulate the life well enough to keep yourself safe from most things.
2: Warding comes easily to you.
3: Your skill in keeping yourself safe with magic is very effective.
4: The toll of a depleted life well doesn't seem to effect you as greatly.
5: You have found a perfect balance between keeping yourself defended and at peace with the life well.
6: Legend has it, no one was able to come near her while she was in an abjuration trance.
As a note, in coded combat, this skill is a more defensive form of magical combat. In a GM'd scene it takes on more utility.