Energy Crystal
225px-Bender's Game Part 2
Invented by Farnsworth
Purpose of invention accidentally created
First appearance Bender's Game

The energy crystal was made by Hubert Farnsworth while he was working for Mom's company. It was made to control all dark matter in Futurama, when the energy crystal meets The Anti-Backwards Crystal both of those crystals will explode and making all dark matter worthless. Mom kept the enegry crystal so she can scam everyone for dark matter. When Ignar hugged his father it was revealed that he ate the enegry crystal both those crystals exploded.