I am interested in casting line in the sand, but the character in question is a warpriest, not a bloodrager, magus, sorcerer, or wizard. I don’t want to multiclass, and in any event would like to use my warpriest caster level as well as Wisdom for the spellcasting ability score. Is there any way I can add this spell to my warpriest spell list?
If it matters, the warpriest is (ideally) a chaotic-neutral devotee of Calistria, and only material legal in Pathfinder Society is allowed. See this answer for more details about the rest of the desired build. The goal is to replace Combat Reflexes with line in the sand and then dump Dexterity in favor of either Strength and the Strength blessing, or Wisdom and the Guided Hand feat.