Is there any good reason not to just murder all of the merchants for my own convenience?
There are a few dozen merchants scattered around the world of Elden Ring. Some of them are happily sitting right next to a convenient site of grace, but others like to hang out in weird caves or cliff faces in the middle of nowhere, and which are a right pain in the rear to get to.
The thing is, some of these merchants sell essential adventuring supplies like Ballista Bolts that are hard to acquire elsewhere.
Now, when you kill a merchant in Elden Ring, they will drop a https://eldenring.wiki.fextralife.com/Bell+Bearings , which can be turned in to the Twin Maiden Husks at Roundtable Hold, at which point the merchants inventory, becomes part of the Husks inventory. This is extremely convenient! If I murder every merchant, I can simply turn in all of their bell bearings, and now I have One Stop Shopping at Roundtable Hold! I no longer need to bounce all over the world to restock.
Is there any good reason not to do this? Will my actions have unforeseen consequences?
There is no good reason not to do this.
You can kill all merchants to have all their stuff at the Twin Maidens.
I do it in all my playthrough and I always was able to finish the game. And like that no forth and back to those merchants in the map. All at the same location.
You can still sell your stuff to the Blacksmith in the Round Table Hold