The Great Devourer is a giant snake that was seen in Episode 12 Rise of The Great Devourer and Episode 13 Day of The Great Devourer.
The Great Devourer is a snake that grows whenever it consumes something. When it was young, it bit Garmadon, turning him into the evil Lord Garmadon for years, until the Garmatron's destruction. It was unleashed from The Lost City of Ouroborus by Pythor and was ultimately destroyed by Lord Garmadon. The space inside its tomb was later used for the launch of Project Arcturus.
- After its destruction, its venom later awakened the Stone Army under Ninjago.