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					Originally Posted by Makinus  You can always send the commander to a province with a site that causes disease.... the problem is only that the wight will have only a single hit point and you will probably accumulate some afflictions before the commander dies.... | 
	
 see, that's not what the OP wants.  Wights born of disease come back as crippled halfwits incapable of casting the simplest spell, or even lead more than ten undead.
The OP wants a 
clean kill.  So do I, actually.  I was quite disappointed when Wish did not grant me that.  The OP wants his commander to die without injuries.