Resurrection

Clue found in Accord HQ
An extract from a book in the Accord Library- Resurrection in 12 easy steps, page 132:

...so this means that the requirements for summoning and reincorporating different spirits will vary greatly with how long it has been since their demise and their preferred destination post-death. Spirits that have returned to the cycle of reincarnation or who have joined a collection of souls or been bound to another realm or mage’s service will be plain un-summonable; it is highly advised to include preliminary location spells in your resurrection rituals to avoid wasting costly ingredients and lives on a spirit that wasn’t going to return anyway.

As I have stated before, fighting against death comes with a price; the price is immense amounts of soular energy, often beyond even what angels and demons on their own can summon up. There are ways around this, of course, but they can be dangerous. While many necromancers start out by summoning powerful spirits to do their bidding and the leg-work of the resurrection ritual, this is generally not a recommended course of action and has resulted in a good many young necromancers being killed before they ever raise a person. Draining the souls of others is somewhat less dangerous in the short term but more so in the long term, because the number of souls required for the ritual is going to create a large enough trail of bodies to make any semi-competent police force highly suspicious.

The longer an individual has been deceased, the more power is required to return them to life, both in the cost of restoring their body to working order and resummoning the spirit; doing both at the same time to complete the ritual is difficult but is required for the ritual to succeed. Even truly skilled practitioners often enlist the services of their fellow mages to complete the ritual, because it is so difficult to hold both spells up at the same moment.

You will have to do some calculations to determine the quantities of ingredients you will require for the different parts of the ritual; the breakdown of these calculations is as follows:

''...Unfortunately, the rest of the book is scattered somewhere around the Accord base because of a recent imp infestation. Be sure to check back later to see if Aaron has found any more pieces!''