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Arcane School: In addition, specialist wizards receive an additional spell slot of each spell level he can cast, from 1st on up. Each day, a wizard can prepare a spell from his specialty school in that slot. This spell must be in the wizard's spellbook. A wizard can select a spell modified by a metamagic feat to prepare in his school slot, but it uses up a higher-level spell slot.
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Preferred Spell: Choose one spell which you have the ability to cast. You can cast that spell spontaneously by sacrificing a prepared spell or spell slot of equal or higher level. You can apply any metamagic feats you possess to this spell when you cast it. This increases the minimum level of the prepared spell or spell slot you must sacrifice in order to cast it but does not affect the casting time.
Let's say I have Hypnotic Pattern (lv 2 Illusion) prepared in my Illusion School slot, and some other number of level 2 spells prepped. Shadow Trap (lv 1 Illusion) is my Preferred Spell. Could I sacrifice Hypnotic Pattern to cast Shadow Trap? Or, can I only sacrifice the other spells? I bolded the portions that make me think the former, but I could be wrong.
