So, the hermit druid seeks a force to balance the 'life' in this magic of his? Then the answer is death, naturally. You have come to the right place for such a thing. No doubt you've seen the undead crawling all over my domain. They are fueled by stolen power that animates them even in death. That stolen power is exactly what is needed in this spell you speak of. Kill the undead and search through their skulls for a coalesced Drop of Stolen Life. Return it to Ketharas once you have it.