Just looking for some advice on appropriate spell level and affects, I haven't made a new spell since 3.5 so I'm pretty rusty, ha ha. Any general comments and advice is also welcome :)
Suppress Undead Hunger
School Necromancy Level cleric 4, wizard/sorcerer 4
Casting Time 1 standard action
Components V/S
Range close (25 ft +5 ft./2 levels)
Targets One intelligent undead creature or several mindless undead within 30 ft. of each other
Duration Instantaneous (see text)
Saving Throw Will negates Spell Resistance yes
Created by the vampire Ramoska Arkminos during his experiments to find a cure for his vampirism this spell suppresses the urges brought on by undeath in both intelligent and mindless undead. Romoska himself would often use the spell to keep his mind clear while doing research when ready victims were not available or during extensive travels.
The spell has two main functions depending on the type of undead in question, you must choose which type of undead to affect when you cast the spell:
Intelligent Undead: When the spell is cast on an intelligent undead it is usually done so intentionally to alleviate their hunger for some form of sustenance, be it actual flesh and blood or more metaphysical hungers like the need to harm the living.
When used in this way the spell generally lasts for 24 hours, a vampire, for example, would not have any urge or need to feed on mortal blood during this time, though they may still do so if they wish, and when the spell ends the hunger returns stronger than before. For each day that the spell was previously cast on the same undead there is a cumulative 10% chance that it has no effect at all and the undead resumes its feeding habits with even greater zeal.
Mindless Undead: When used on mindless undead this spell functions much like Halt Undead, but affects only mindless undead. The maximum number of HD of mindless undead you can affect is equal to 2d4 + caster level. The affected undead remain where they are and do not attack or flee. They are not helpless and defend themselves normally if attacked. Any threat breaks the spell on the threatened creatures. When used in this way the spell lasts for 1 minute/level.
(I was also considered adding a focus or a material component, something like a drop of mortal blood or a piece of mortal flesh but I wasn't sure.)