Upgradable Mage Staff

This is a custom mage staff with acid abilities. As you advance the staff is upgraded through a conversation using skill checks and saving throws. There are six levels starting as a mundane magical item to the final upgrade for a level 20 wizard/Sorcerer.

This is an item that I created for a Risen hero Campaign. I would like any feed back and advice. There is still one ability missing from the final upgrade granting the wielder a elemental shield with acid damage similar to Mestil's Acid Sheath from NWN HOU.

I have posted a module in directory format. The content can be dragged into a campaign format and I have a erf file of all the scripts, conversations and items.