Binder's Blessing
From Compendium of Worldly Lore
Needs review
Source: Quintessential Elf 2
Description: Your spells remain even after you stop concentrating on them.
Prerequisites: 10 levels of arcane spells, Words of Binding
So long as you maintain more than 10 levels of available arcane spells, spells with a duration of Concentration linger for a number of rounds equal to your Intelligence modifier after you stop concentrating on them. This bonus is added to the duration of the spell, if it maintains itself for Concentration + X rounds. If casting the spell would drop you below 10 levels of stored energy, you may not use this feat.