Domain Secret (Ex)
 
At 5th level, the theologian chooses one domain spell. That spell becomes permanently modified with one of the following metamagic feats: Bouncing Spell[APG], Disruptive Spell[APG], Ectoplasmic Spell[APG], Enlarge Spell, Extend Spell, Focused Spell[APG], Intensified Spell[APG], Silent Spell, Still Spell. This metamagic feat does not increase the level of the spell. Once chosen, this modification cannot be changed. The domain specialist need not have the metamagic feat to apply it to a spell using this ability. At every 5 levels after 5th, the domain specialist may choose an additional domain spell to modify in this way. She cannot modify the same spell more than once.

Benefit: An intensified spell increases the maximum number of damage dice by 5 levels. You must actually have sufficient caster levels to surpass the maximum in order to benefit from this feat. No other variables of the spell are affected, and spells that inflict damage that is not modified by caster level are not affected by this feat.