As a swift action, a warpriest can expend one use of this ability to cast any one warpriest spell he has prepared. When cast in this way, the spell can target only the warpriest, even if it could normally affect other or multiple targets. Spells cast in this way ignore somatic components and do not provoke attacks of opportunity. The warpriest does not need to have a free hand to cast a spell in this way.
If i use fervor to cast a prepared spell as swift action the spell slot is consumed?
