Thought Sand

Thought sand appeared first in the episode "Sleep Paralysis", when the Shadow shows Will the bag of thought sand.

Thought sand appears to be a gray-ish powder with small chunks of unknown stone. If put in water, saying a special curse can cause a person to remember a certain memory if consumed.

-The actual bag of thought sand used in the episode smells like cinnamon.

-Alec Baker said "If you're planning on making real thought sand, I would recommend putting in 1/5 bag of dirt, some Parmesan cheese, flour, salt, paprika, cinnamon, and magic. Lots of magic."

-Thought Sand may not actually exist in the Plumber Who universe, due to this only appearing in a dream.