The yang and yin team of Connor, the Urban Paladin, and Heather, The Mystic Cleric, is very effective as his pragmatism is balance by her optimism, her enthusiasm and idealism are tempered by his cautious paranoia, his wounds are healed by her, and she is kept alive by his sword. This effectiveness aside, Connor and Heather are not your normal adventurous members of The Church. Nor are they a couple.
A secret MLM (pyramid) company that offers eternal life, but in fact it transfers the life forces of its members to those position "above". If you get high enough, (meaning you get enough new members) you start to enjoy the benefits. Maybe a willing sacrifice is much more effective for the transfer. But no one says, that a suddenly unwilling member, threatening to tell the authorities, may not loose it involuntarily... thus start people to vanish, and aged corpses are deposited somewhere safe.