Widen Spell

You can alter a burst, emanation, line, or spread shaped spell to increase its area. Any numeric measurements of the spell's area increase by 100%. For example, a fireball spell (which normally produces a 20-foot-radius spread) that is widened now fills a 40-footradius spread. A widened spell uses up a spell slot three levels higher than the spell's actual level. Spells that do not have an area of one of these four sorts are not affected by this feat.

You can alter a burst, emanation, line, or spread shaped spell to increase its area. Any numeric measurements of the spell’s area increase by 100%. For example, a fireball spell (which normally produces a 20-foot-radius spread) that is widened now fills a 40-footradius spread. A widened spell uses up a spell slot three levels higher than the spell’s actual level. Spells that do not have an area of one of these four sorts are not affected by this feat.

You can increase the area of your spells.