DCraw
Dwarf in the Playground

*May not make an "Ever-Replenishing Deck of Many Things" that never runs out of cards
** May not make it a cursed item that binds itself to you when you pick it up
*** May not make it so that you can only get rid of it by deceiving others into buying it from you in a dishonest trade.
**** May not make it try to compel you to draw a card from it with a will save once every day.