|This needs a stretch. (Feel free to remove when satisfied of completion.)|
* Physical appearance.
The Heart of the Jaguar was a heart-shaped spearhead made by the Hunters of Secrets to destroy the Evil Entity. However, conquistadors took the crystal sarcophagus it was held within, leaving their mission a failure. Eventually it was buried along with them in their resting place in a temple in the Yucatán.
Centuries later, it was to be discovered by the current Mystery Inc. and to be taken back to Crystal Cove, where the Evil Entity's sarcophagus now resided beneath the town. When they found the evil Anunnaki, they used the Heart on the sarcophagus, but it shattered. In reality, it was revealed that the spear was never the true Heart, it was actually the unbreakable bonds of friendship between the gang.
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When the Hunters of Secrets realized that they were being manipulated and corrupted by the evil Anunnaki inside the crystal sarcophagus they had discovered, they forged the Heart of the Jaguar spear as both a symbol of their friendship and as a weapon to strike against the Entity. However, they did not get the chance to do so before the sarcophagus was taken from its resting place by Fernando El Aguirre and his men, leaving the spear to become an artifact in its own right.
Scooby-Doo! Mystery Incorporated
They had Angie Dinkley's old friend, Professor Enrique Andelusossa, search for it, but when he got there, he staged an attack by the Priestess in a scheme to get back Angie. The gang and Angie went there to rescue him and found the Heart of the Jaguar, themselves, from the remains of one of the Hunters.
Following the release of the Evil Entity, Scooby-Doo used the spear to strike against it, only for the head to shatter against the mutated body of Professor Pericles that the entity was using as a host. After realizing the true nature of the Heart of the Jaguar, the gang worked together to reclaim the remains of the spear and knock it into the Evil Entity's sarcophagus, destroying the monster's power source and erasing it from existence.
- Scooby-Doo! Mystery Incorporated
- It could be like the other keys, symbolic of an element and in this case the fifth element, known as quintessence or heart, hence it is the 'Heart' of the Jaguar. The fact that the Hunters' mascot is a jaguar, it would seem to be symbolic of Spot.