You gain amazing control over your spells area of effect.

Prerequisite(s): Enlarge Spell

Benefit: You can alter a burst, emanation, line, or spread shaped spell to decrease its area. Any numeric measurements of the spell's area are reduced by 50% (rounded down, but to a minimum of 5 feet in any dimension). Spells that do not have an area of one of these four sorts are not affected by this feat.

A reduced spell uses up a spell slot two levels higher than the spell's actual level.