This is a quick rework of a previous Mentem spell Torture the Restless Dead with the duration extended to Ring and the auditory element removed. This spell answers the question of what a necromancer could threaten a ghost with to get them to fully cooperate – eternal pain.
Perpetual Torture of the Dead
Perdo Mentem 30, R: Arc, D: Conc, T: Individual
This spell connects the caster to ghost of a dead person for whom they possess the arcane connection (or body), and inflicts pain upon the ghost.
(Base 4, +4 Arc, +2 Ring)