The Nightmare Stone

The Nightmare Stone, is a giant crystal that causes anyone to touches it to get nightmares and stuff.

History
The nightmare stone first appeared in Crystal Funhouse where Smg3 set it as a trap underground so when Smg4  and some of his friends  found it they all tocuhed it and got trapped in a nightmare controlled by Smg 3. They later all escaped with the help of ADD and GD. The stone returned again in



Bowser and The Nightmare Stone where Smg3 sold the stone to bowser so he can take revenge on Mario along with Smg4 and his friends again with a nightmare, but they escaped again and some nameless guy broke the stone with a pickaxe. It appeared one last time in  Smg3' plan to destroy Smg4 because he felt like it, where Smg3 used it to bring back abunch of previously killed bad dudes.

Power and Abilities
The Nightmare Stone has the ability to make anyone who touches it trapped in a nightmare, and if it's someone rubs it and takes control, they can trap anyone in a nightmare they desire with a strike of lightning. Also, it can apparently bring back anyone who is deceased.