You're so familiar with certain spells you can prepare them with the greatest of ease.

Prerequisite(s): Spell Mastery.

Benefit: You can prepare spells you have selected with Spell Mastery as a full-round action. You must spend the appropriate amount of time preparing other spells you have not mastered. As a full-round action, you can expend one use of mythic power to prepare all your spells that you have selected with Spell Mastery.