This spell hides a being's lifeforce (shakti) from detection, preventing spells like karma sight and reincarnation sight from working on the creature. It can also prevent a creature from being reincarnated, at least temporarily. By casting conceal lifeforce on a creature within an hour of its death, the creature's self (atman) is hidden from the divine agents who attend to reincarnation.
This spell allows the subject to be raised or resurrected. (According to Legends & Lore, this is the only way raise dead or resurrection can be used on a character from this culture more than a day after death.) Using this spell to prevent reincarnation is a violation of the cosmic order and may trigger divine wrath.
Notes: Common for priests from a vedic (Indian) culture; otherwise very rare. (Updated from Dragon Magazine.)