Forensic Evaluation is the primary skill for both Necromancy and Gravedigging.
Forensic Evaluation is the Necromancer's primary spellcasting skill when using the Necronomicon.
Spirit Speak functions as the potency skill for Necronomicon spells, much as Evaluating Intelligence functions as the potency skill for Magery. A new reagant obtainable from Gravedigging and undead mobs called Grave Dust is used for all Necromancy spells.
At 60.1 Forensic Evaluation and Magery, the ability to use and unlock spells in the Necronomicon is granted.
At 80.1 Forensic Evaluation (with a minimum of 30 Spirit Speak), the Curse and Mass Curse spells become more potent, with a 50% bonus to their effects at GM (compared to normal). Additionally at this skill level, players can meditate in Bone Armor and the passive mana regen penalty compared to non-FE players is cut in half.
At 60.1 Forensic Evaluation and Spirit Speak, the player transitions into a permanent Undead state (unless either skill is lowered below 60.1).
As a result, healing and beneficial spells outside of the Necronomicon cannot benefit the Necromancer, and instead they now harm them, at a level based on spell circle. This includes spells such as, but not limited to, Protection, Magic Reflection, Reactive Armor, and Arch Protection.
Normal poisons affect Necromancers the same way as any other player- you are not immune from poison.
Necromancers are also harmed by Heal potions. The only way a Necromancer may heal themselves is through spells in the Necronomicon or bandages. Other potions besides Heal work as normal, including Cure.