Desperate Swing

Combat

You land your most telling blows in desperate situations.

Prerequisite: Cautious Fighter, base attack bonus +1, halfling.

Benefit: Once per day, you can make a single melee attack while taking the total defense action. You take a –4 penalty on attack rolls when making this attack. You also gain a +4 bonus on critical confirmation rolls made while fighting defensively or making an attack of opportunity using this feat.

Source: Advanced Race Guide