Sacrificial Writes

<As you peer inside the tome, you find a verse appear, glowing bright red.> "For blood to bond, one strikes a deal, A sacrifce which will appeal. Seek out the lame, and never yield, For in return, you shall be healed." <As you finish reading the verse, you notice that a scroll has appeared in your hand. Written across the top it's titled, "Writ of Sacrifice". Various runes, unknown to you, appear on the rest of the scroll. Yet, there's no explanation as to what to do with the scroll...>