Kuro Kabuto

The Kuro Kabuto, better known as "Shredder's helmet", is an ancient relic and symbol of the Foot Clan, it was created by the clan's founder, Koga Takuza, about 1,500 years ago. To forge it he used the tokens of his defeated enemies, creating a helmet stronger than steel. Oroku Saki vowed to protect the helmet with his life when he became the leader of the Foot Clan. It first appeared in Rise of the Turtles, Part 2, but only in The Legend of the Kuro Kabuto its history of origin was revealed.

Trivia

 * Kuro Kabuto means Black Helmet in Japanese.