Episode 29 Spoilers: Fun Fact: This book that released over 10 years ago was the first indication that The Overlord was the one responsible for you know who. : r/Ninjago
LEGO Ninjago: Secrets of the Forbidden Spinjitzu - stream
LEGO Ninjago: Masters of Spinjitzu: Season 15, Episode 29 - Rotten Tomatoes
Ninjago Season 11, Episode 29 “Once and for All”: Analysis & Review - YouTube
LEGO Ninjago_ Season 3_ Rebooted Episode 3/29_Blackout - Bilibili