maggot said:
First, I removed the part about undoing artifacts, otherwise the spell becomes "destroy plot".
Oddly, I consider that part a plot hook. Using Mordenkainen's Disjunction is one way of SOME PC parties to complete a mission of destroying an artifact, but the price is... 95% chance of starting another adventure!
I know that it can potentially remove ideas like "you can only destroy this artifact by travelling to Mordor", but I have no problems with SOME archwizards in the world being able to attempt doing it with the spell.
Fact is, if the party knows how to cast the spell, I won't probably bother using an artifact as a mean to trigger the next adventure (the Mordor case). I will simply use another hook. One or the other hook doesn't really matter, they are all usually trite ideas anyway.
By the way, I see this spell as a "last resort" that a wizard would never use repeatedly, but only when all other options have failed.
And also I rarely play games that high level, which I reserve to an incredibly few PC/NPC in the world. Because of that, I do not even expect 9th level spells to be very balanced.
maggot said:
Otherwise the spell is too brutal and takes too long to resolve.
That could actually been seen as a deterrent
