You can cast a spell from a scroll without expending it; the writing of the activated spell does not disappear.

Prerequisites: Scroll Mastery, Spellcraft 9 ranks

Benefit: When activating a scroll, you may choose to lose two prepared spells or spell slots of the same level to preserve the scroll, so it may be used again in the future.

Special: If the spell normally requires material components with a listed cost, you must also provide and use those components to preserve the scroll.