Reactive Counterspell
( , p. 42)[General]
You can react quickly to counter spells cast by opponents.
Prerequisite
Improved Initiative (PH) , Improved Counterspell,
Benefit
Once per round, you can counterspell an opponent's spell even if you have not readied an action to do so. This counterspell action takes the place o f your next turn. You can't u se this feat when you are fl at-footed.
Normal
Without this feat, you must ready an action each round that you wish to use a counterspell.