Dark Matter (also called Concentrated Evil) is a sinister muddy matter known for turning someone evil.
Dark Matter is a violet material commonly mistaken for mud mined from Digger's Deep. In its natural state, it has light purple dots and a visible glow—when refined for weapons use, it becomes almost black in coloration. It is usually handled in trays or the Garmatron. Dark Matter is used in a shell, and it bears resemblance to regular stone.
- Dark Matter was weaponized for the ultimate weapon to make Ninjago in Garmadon's image.
- If the two islands were reunited, the Dark Matter from the Dark Island would most likely poison Ninjago.
- The way the Dark Matter got onto the Dark Island is probably because of manifested evil, relating with the destruction of the Overlord. This meant as the Overlord's body became worse over time, Dark Matter possibly accumulated.