|Douglas Muir 406|
The Sacred Grove has had two Keepers for centuries. One is always male and one is always female. Their races vary; they may be a human and an elf, or a dwarf and a gnome, or whatever. Even monstrous races like gnolls and orcs have occasionally been represented. The general assumption is that when one Keeper gets old, he or she lies down and merges with the Grove, and a new Keeper appears as a pilgrim, right on time.
The general assumption is wrong. It's been the same two Keepers for all these centuries. They're high enough level to cast Reincarnate, yes? Here's a little-noted thing about Reincarnate: it reboots you in a young adult body, restarting the count towards the next age category. So whenever one of the two starts slowing down a bit, the other takes a sacred sickle, cuts his or her throat, puts most of the body in the compost pile -- waste not, want not -- and then casts Reincarnate on a finger or whatever. A week or two to shake off the negative levels, and voila: a new Keeper has arrived.
The two Keepers have a relationship that has lasted through the centuries, in part because swapping bodies every decade or two helps keep it fresh. Whether this is adorable or pervy is up to you.
-- Plot seed: One of the Keepers has information from centuries ago... the true name of a wizard-king who's now a powerful lich, the location of the magic sword that can save the kingdom, what have you. The PCs must first find the Keepers and then persuade him or her to help. (For best results, the Keepers should be comfortably more powerful than the PCs, and not an exact match in alignment.)
-- Plot seed: One of the PCs serves Pharasma or a similar god of death. And Pharasma has had it with these two -- Raise Deads are one thing, but these guys have been in and out of the Boneyard so many times that some of the junior psychopomps have started a betting pool on when the next pass will be. It's an affront to the dignity of Death, is what it is. It's time for these two to move on...
-- Plot seed: The Keepers' relationship has been growing gradually dysfunctional. Now one of them desperately wants out... s/he has fallen out of love with the other Keeper, is tired of the cycle of rebirth and wants to live a life beyond the Grove, even if it means accepting true death. But of course, the other Keeper doesn't see things that way. What was once a loving symbiosis has now become an increasingly abusive relationship. And just then, the PCs come along...