I think the hardest part of it is making the body-snatching thing
.
The others arent too difficult, the fear aura may be a permanent cap of fear spell (that is easy to do), and so on, but the corpse thing is really hard i think. I dont think the game knows where a corpse is, i think when you kill an enemy the game loses all the info about its location...
Anyway, good (and complex) ideas !!
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"Let my spells do the dirty work" Ertai, High Sorceror of the Holy Flame