Under normal circumstances, the demon would simply seek a new host. However, these are specific demon-killing weapons. So at an... Educated guess I'd say that the weapon would kill the demon permanently or at least contain it. Naverone offered. It wouldn't hurt to have a contingency plan set up though,
				
			 
				 
 
		 
   
 
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		