Mage Knight: Machination
Greater Ambit Focus
Prerequisites: Ambit Focus in the chosen ambit
Benefits: You function at +1 caster level when casting cantrips of the ambit you select. Add +1 to the Difficulty Class for all saving throws against cantrips from the ambit you select. These bonuses stack with those granted by Ambit Focus.
You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new ambit.