Ninjago Facts S15 SPOILERS on Twitter: "105: 9573 Slithraa is the only Spinjitzu Spinner set to include a Serpentine Staff. This is likely because Slithraa was the original general of the Hypnobrai,
LEGO Set 80741919-1 Ninjago: Ninja vs. Hypnobrai (2012 Books) | Rebrickable - Build with LEGO
Lego Ninjago Blue Rattla Snake Serpent Hypnobrai Minifigure | eBay
Utube Kid 12 - LEGO® Ninjago Rise of the Snakes Hypnobrai Tribe Serpentine Minifigure Coll - Vidéo Dailymotion