MarkB
Legend
I tend to the opinion that incredibly powerful magical weapons should NOT have their inherent weaknesses taken away. The party is generally capable of destroying or at least throwing such things away if they become a problem.
Well, the sword is going to spend most of its downtime in that scabbard. Maybe it'll turn its attention to influencing it, leading to either the sword gaining the ability to cast Silence as an area-effect at the most inconvenient times, or else the scabbard eventually becoming an evil, intelligent, talking scabbard of silence.
 
				 
 
		 
 
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 It was owned by an assassin and casts silence on the wielder for one turn when you draw a weapon. It lets you get that one good shot off while the victim can't scream. The paladin might find their vocal component spells not working in the first turn of a combat. Still, they will put it down to a quirk of the enchantment and even a handy benefit. Not knowing the origin of the item. The scabbard will be overjoyed to meet the sword. It can cast silence when the cleric is trying to heal the paladin, when he needs to call for help, when he needs to negotiate a truce, when he needs to cast a spell. It is patient though and will bide its time.
 It was owned by an assassin and casts silence on the wielder for one turn when you draw a weapon. It lets you get that one good shot off while the victim can't scream. The paladin might find their vocal component spells not working in the first turn of a combat. Still, they will put it down to a quirk of the enchantment and even a handy benefit. Not knowing the origin of the item. The scabbard will be overjoyed to meet the sword. It can cast silence when the cleric is trying to heal the paladin, when he needs to call for help, when he needs to negotiate a truce, when he needs to cast a spell. It is patient though and will bide its time. 
 
		 
 
		 
 
		 
 
		 
 
		