Improved Concentration

Through intense study and practice you have developed a level of focus that is beyond most spell casters. This increased focus grants you the following benefits:

• Increase your spell casting ability score or constitution by 1, to a maximum of 20.
• You are able to maintain concentration on one additional spell at the same time. While concentrating on spells, if you cast another spell that requires concentration and you are at your concentration limit, you decide which of your previous spells you lose concentration on. If you become incapacitated or die, you lose concentration on all spells. If you take damage, you roll your concentration checks separately for each spell you are concentrating on.

This feat can be taken more than once.