Casting Defensively: If you want to cast a spell without provoking any attacks of opportunity, you must make a concentration check (DC 15 + the level of the spell you're casting) to succeed. You lose the spell if you fail.
Notes
- Moving or using other feats that require manual activation will cancel the defensive casting mode.
- There is -4 penalty (the DC is 19 + the level of the spell you're casting) if you cast within 4 meters of an enemy unless you have the feat Combat Casting.