You are very familiar in overcoming the weaknesses of certain infernals.

Choose: A creature type or subtype that is considered to be infernal (aberration, fey, goblinoid, incorporeal, outsider, or undead).

Benefit: Whenever you cast a sutra that targets a creature of the chosen type or subtype, your sutra caster level for the purposes of that sutra is treated as 2 higher than it actually is.

Special: You can gain this feat multiple times. Its effects do not stack. Each time you gain this feat, select a new creature type or subtype.