Thanks for the input guys, I really appriciate that 

I'll take a look of your suggestins.
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		| Why do you need to give the Unholy Blessing to a nation? | 
	
 Maybe I mis-wrote my intention. I'm writting a mod that gives you a new nation of undead (so far 2000 of lines, history is built, 60% of sprites done), but I want to make my undead priests have same casting spells like the Ermor undead priest have.
So far I can make my undead priests to reanimate undead.