Make it Epic
I like the new version posted, but I still allow MD in my campaign. I've just restricted it to being an epic level spell:
Spellcraft DC= number of items * 2 +caster level of item with highest effective caster level + highest will save of any affected creature.
Sure it may be bulky, but it would allow Elminster or Szass Tam to eliminate all of a 20th level party's gear (which seems reasonable), while preventing an 19th level Wizard from destroying over 1 million gp in wealth.
I like the new version posted, but I still allow MD in my campaign. I've just restricted it to being an epic level spell:
Spellcraft DC= number of items * 2 +caster level of item with highest effective caster level + highest will save of any affected creature.
Sure it may be bulky, but it would allow Elminster or Szass Tam to eliminate all of a 20th level party's gear (which seems reasonable), while preventing an 19th level Wizard from destroying over 1 million gp in wealth.