Pathfinder 2e Spell: Katabasis

Cost An item of personal significance to the target Secondary Casters 2; Primary Check Religion (expert) Secondary Checks Medicine, Underworld Lore

Performing this ritual in a graveyard or other place close to the Underworld grants a +2 item bonus to the primary and secondary checks.

You call forth a ferryman from the depths of the Underworld and present the body of a dead creature to it. Depending on your check, the ferryman will escort you, and any number of willing allies present, into the Underworld. The ferryman does not protect you or your allies from the denizens of the depths, but cthonic ettiquette and superstition makes it taboo for the dead to harm those in a ferryman's company.

When you arrive at the target, you must complete a challenge as dictated by the local keberoi. Creatures level 6 and below generally have not made it to these depths, and instead ghosts or other Underworld residents will attack in a desperate bid to find a way back to the Material.

If you are successful in meeting this challenge, the ferryman will escort you, your allies, and the target back to the land of the living where the target is restored to life.

Critical Success You are escorted to the location of the target. They are so inspired by your rescue that they receive a +1 status bonus too attack rolls, Perception, saving throws, and skill checks for 1 week. They can participate in the challenge described above with full hit points and the samee spells prepared and points in their pools they had when they died, and still suffering from any long-term debilitations of the old body. When you return to the Material, their body is restored to life. The target is also permanently changed in some way by their time in the afterlife, such as gaining a slight personality shift, a streak of white in the hair, or a strange new birthmark.
Success As critical success, except that the target is not inspired by your arrival. Instead they have been severely wounded by the Underworld, gaining the clumsy 1, drained 1, and enfeebled 1 conditions for 1 week; these conditions can’t be removed or reduced by any means until the week has passed. When you return to the Material, the target is restored to life with 1 Hit Point and no spells prepared or points in any pools, and still is affected by any long-term debilitations of the old body. Instead of inspiring them.
Failure As success, but the keberoi does not permit the target to participate in this challenge. The target remains trapped in some way until the challenge is completed, or they are freed by you or your allies.
Critical Failure The ferryman is displeased with your offering. It takes the cost of this ritual and returns to the Underworld.