jgsugden
Legend
If a PC finds a Vorpal Sword, it will become their overwhelmingly best option. It won't be close. Problem?...
So, you've helped me clarify that it becoming my best option wasn't the problem, wasn't the problem. Being overwhelmingly better was.
Putting aside the assumptions about how useful all those fireballs are (by necessity, the 6th, 7th, 8th or 9th fireball in s dungeon will be used, at best, in the 6th, 7th, 8th or 9th best situation to use the fireball...), having a great, iconic and powerful magic item is not a problem. Having it be the 'go to' of the PC is not a problem. Having it be their strongest option for several levels is not a problem. That just makes it iconic for that PC.
Embrace. The. Flame.