Reactive Counterspell

(Player's Guide to Faerûn, page 42, DnD 3.5)

[General]

You can react quickly to counter spells cast by opponents.

Prerequisite

Improved Initiative, 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.