Wrath's Amulet

Wrath's Amulet is a cursed amulet that traps one of the spirits of the Seven Deadly Sins, Wrath. It made it's first appearance in Wrath's Amulet.

History
Long time ago in ancient Chinese history, Wrath corrupted all of China and cursed hundreds of people with his anger and turning them into his demon-like minions. But Mulan and her friends, along with a wise sorcerer, defeated Wrath by trapping him inside an amulet and hid it so no one can find it. Until, a beautiful princess found and wore it and then kept it around her neck all the time and never took it off. Then, something happened to her; she became cruel and nasty to her people and caused a lot of mischief in the village. The villagers at the time then realized it was that long lost amulet that caused her to become a monster so they called Mulan and her friends to save the princess by removing the amulet! But with the amulet's power, she was so powerful that she transforms into a demon-like humanoid and even Mulan and her friends can't defeat her. As the transformed princess was about to finish them, Mulan quickly pulls out a magical amulet that weakened Wrath's powers and purified the princess, who was then back to her normal self and then took the amulet off her and gave to Mulan for safe keeping.

And ever since then, the amulet was passed down through generations as nothing more than a piece of antique jewelry. Until three centuries later, Kwazii bought it for Jake's birthday who was totally unaware that the amulet has cursed Jake and turned him into a troublemaking monster.

In the series
Kwazii bought the amulet from an old vintage jewelry shop and gave it to Jake for his birthday. But as he wore it around his neck, Jake became a cruel and nasty troublemaker that caused chaos for everyone in town, including his best friends. Kwazii, Captain Barnacles, and Peso then learn that the amulet was causing Jake to behave badly after visiting the vintage shop and listening the shopkeeper's story about the amulet.

When they find Jake at the park full of crying kids and annoyed adults covered in ice cream and mud, Kwazii tries to defeat him and take the amulet off Jake but the amulet was making him too powerful! So powerful that he transformed into a demon-like humanoid just like the princess who wore the amulet centuries ago and not even Kwazii's powers were strong enough to save him from the amulet's powers. Until after the possessed Jake sees the Octonauts hurt, he realizes what he has done and while Kwazii, weak in the knees, got up to encourage Jake to resist Wrath's power. Then, while Jake was crying, Kwazii purifies him with his Heart Changer that even destroys the amulet and Wrath's spirit who was never heard from again.

Abilities
Besides making someone who wears it and cruel and nasty mischief maker, the amulet can also give it's wearer dangerous abilities:
 * Demon like aura wings
 * Super sonic scream
 * Super strength
 * Fireballs
 * Sharp claws

Trivia

 * The possessed wearer is similar to the Dazzlings' siren transformation when transformed.