Needs review
Source: Dragon Magazine #351

Description: You can spot the weaknesses of your opponents.

Prerequisites: WIS 13, Arcane Focus, Ability to cast 2nd Level Arcane Spells

When you expend your arcane focus, you may select one of the following three benefits.

Damaging Spell: The next melee touch attack spell you cast within the same round you expend your arcane focus deals 25% more damage.

Spell Critical: You double the threat range (19-20) of the next melee touch attack spell you cast within the same round you expend your arcane focus.

Weaving Strike: You gain a +2 competency bonus on the next melee touch attack you make with a spell. You must cast the spell within the same round you expend your arcane focus.

Special

A wizard may select Potent Dweomercraft as a wizard bonus feat.