Te Fiti's heart, a small jade stone, was stolen by the demigod Maui, only for him to encounter the lava monster Te Ka, which caused his fishhook and the heart to disappear into the ocean.
Te Fiti's heart, a small jade stone, was sought after as it could be used to create life. He then encounters the lava monster Te Ka and is never seen again, as his fishhook and the heart are lost into the ocean.