Until you end this stance, your attack spells achieve a critical hit on each natural roll of 18-20. You may end this stance as an immediate interrupt when you would miss one or more targets with a spell to re-roll each attack check that you do not like. You must use the second set of rolls, even if some of them are lower.
At each even level, you may choose a new at-will Metamagic from this class feature or any of your other class features, or training in a proficiency of your choice.
At each odd level, you may choose a new ranked Metamagic from this class feature or any of your other class features, or may choose a new class feature from your class.
A creature within 10 paces attempts to cast an at-will or ranked spell, trance or prayer of a lower rank than the per-encounter feat use expended to cast this metamagic (Arcana vs. the caster's check result).
As you enter this stance, choose up to three metamagic stances that you know whose total ranks are less than the per-encounter feat rank expended to perform this metamagic. Until you end this stance, you gain the benefit of each of those stances.