But, maybe it's like the rod of winds that can cast a level 55 buffet...but you need to be level 55 to zap it.

Or the talisman that casts dragon breath...if you're level 52 and can brandish it.

Or the scroll that casts L59 hold person, power word kill, and pebble to boulder...Just get to level 59 and you can recite it. :)