Skill: combat casting.
This skill is almost impossible to learn.
The skill is automatically in use.
Casting spells in combat can be hazardous and affect your ability to defend yourself or make attacks very difficult to perform properly. Those experienced in the ways of combat casting can negate some of those negative effects and maintain their concentration on both combat and spellcasting. Additionally this skills makes it less likely to lose concentration on your spell when you are hit during spellcasting.