Mammatus

“We took a sacred oath to keep the Storm Amulet safe from those who would seize it. We harnessed the power of lightning, and became one with the storm. Our forefathers kept the oath, and their forefathers, all the way back to the beginning.”

— Mammatus, "The Keepers of the Amulet"

Chief Mammatus is the leader of the Keepers and one in a long line of the protectors of the Storm Amulet. He is the main antagonist of The Island and an ally in Seabound.

At an unknown point in time, he became the Chief of the Keepers, and sole protector of the Storm Amulet. One day, the Keepers became deceived by Ronin, and appeared to think that the storm spirit Wojira was ordering them to give her gifts. Mammatus obliged, but it would take the Ninja arriving on his island to discover the farce.

Later, he would entrust Nya as the new protector of the Storm Amulet after it became sought after by King Kalmaar.

Design Variants[]

LEGO Ninjago series
Ninja	Zane ∙ Lloyd Garmadon ∙ Cole ∙ Kai ∙ Jay Walker ∙ Nya ∙ Arin Nived ∙ Sora ∙ Wu
Villains	Samukai ∙ Pythor ∙ Garmadon ∙ Overlord ∙ Chen ∙ Morro ∙ Nadakhan ∙ Clouse ∙ Yang ∙ Time Twins ∙ Harumi ∙ Iron Baron ∙ Omega ∙ Aspheera ∙ Ice Emperor ∙ Unagami ∙ Skull Sorcerer ∙ Mammatus ∙ Kalmaar ∙ Crystal King ∙ Beatrix ∙ Ras ∙ Thunderfang
Story Arcs	Prophecy of the Green Ninja ∙ Master Trials ∙ Oni Trilogy ∙ Book of Elements ∙ United
Ninjago: Masters of Spinjitzu	0. Pilot Episodes ∙ 1. Rise of the Snakes ∙ 2. Legacy of the Green Ninja ∙ 3. Rebooted ∙ 4. Tournament of Elements ∙ 5. Possession ∙ 6. Skybound ∙ N/A. Dark Island Trilogy ∙ Special. Day of the Departed ∙ 7. The Hands of Time ∙ 8. Sons of Garmadon ∙ 9. Hunted ∙ 10. March of the Oni
LEGO Ninjago	11. Secrets of the Forbidden Spinjitzu ∙ 12. Prime Empire ∙ 13. Master of the Mountain ∙ Special. The Island ∙ 14. Seabound ∙ 15. Crystalized
Ninjago: Dragons Rising	Dragons Rising ∙ Season 2 ∙ Season 3 ∙ Season 4
Other	Go! Ninja ∙ Way of the Departed ∙ The Splinter in the Blind Man's Eye