I ran a old module once where one peice of treasure was a cursed scrool of summon cockatrice.
About a week, and another cleared dungeon later, the 1/2 wizard finally gets around to trying to ID the scrool. He was going though treasure in the wagon while eveyone else was having breakfast on the other side.
So he reads the scrool, the cockatrice appears,....and the wizard trys to kill it himself. The fighters are eating rations a few yards away, and he doesn't call for help. 6 rounds later, the wizard is stone, and the cockatrice is gone. When the party finds him, all they got is a statue, a blank scroll, and some chicken tracks.
They had just rescued some elf and human children from some rabolds in an old dwarf mine (changed from goblins to throw the dragonborn pc a bone). One of the elf kids thinks that maybe "Grandpa can fix him", so they load the statue into the wagon. It end up serving as a towel rack, christmas tree, jungle gym, and after encountering a wondering cleric/sundayschool teacher, the PCs take the colored chalk and crayons and "make up" the statue wizard.
I put the elf villiage on the other side of a "monkey god" module, and the pcs ended up crossing a warzone. After they took a fort, they discovered that the orks were sending reenforcments. They put the kids, npc healer, and animals in the kitchen, and used the statue as the last line of defence and overturned wagon as the first.
The pc meanwhile is alternately playing his familiar, one of the kids, or the NPC contact of the day.
The pc ended up staying stoned for nearly 2 full months of game time, but everyone had fun with it.
I will always remember the michivious glee in the eyes of the player of the dwarf pc as he sieged on the throw away line about the cleric giving coloring books to the kids.....