The Soul-Sucking Death Worm is a colossal monstrous worm that appeared in the episode "Dead at Eight". After Mordecai and Rigby reads The Hungry, Hungry Soul-Sucking Death Worm to Thomas, they pull a tab which releases the Soul Worm. It appears that it eats mainly, or just, souls. It can be put back if it runs into the book.It was trying to get Muscle Man in the episode.
It is a giant reddish-orange worm with a giant mouth with little waving pieces of skin and no eyes. The bottom of the worm is just a lighter shade of red-orange. It's actually normal for worms to be eyeless.
- He is an obvious parody of The Very Hungry Caterpillar.
- The reason Thomas says that the book is his favorite is because he wants it to be released and feast on souls.
- For some reason, it will only eat souls that are not one with the body.