GNSmud

I have been toying with the idea of adding polymorph potions into the game.
By its nature, adding poly to all classes like this has huge un-balancing potential, so it would need to be modified.

Instead of using the normal poly tables, create a mob in the zone the potion is that it links directly to.
Add a check for levels, if char drinking is lower level than the poly mob, potion fails.

This would open up some interesting new zone plot ideas and quest goals.

Or you could tune the poly mob to the level of the player character.. if the PC is level 4, the NPC is mmedited to the default matching level.