Maxwell Monster

Oni Mask of Vengeance (Red) - Turns the user into a master swordsman with two additional arms and gives the user the ability to catch and deflect other people's powers. This mask was kept in a secret compartment within Borg Tower before it was stolen by the Sons of Garmadon during "The Mask of Deception." It is the preferred mask of Mr. E. Ultra Violet used it in Season 9 intro, but she hadn't used it in Season 9, after Mr. E's death. It is the only mask that has not been destroyed so far and it is currently located in the Borg Tower vaults. Oni Mask of Deception (Orange) - Allows the user to control, move, and manipulate objects by using telekinesis. This mask was guarded by the Royal Family in the Royal Palace before Ultra Violet recovered it from Lloyd and Harumi's possession during "The Jade Princess." It is the preferred mask of Killow. It was destroyed by Skylor, while controlling the Colossus in "Saving Faith." Oni Mask of Hatred (Purple) - Turns the user's entire body into invulnerable magma stone and lava. This mask was hidden in the Oni Temple deep within Primeval's Eye before it was stolen from Lloyd by Harumi during "Game of Masks." It was used by Harumi in "Game of Masks," "Big Trouble, Little Ninjago," and "The Gilded Path." Ultra Violet uses it in "Dread on Arrival," "Saving Faith," and "Lessons for a Master." It was destroyed in "Lessons for a Master."