Sun of Lemuria

The most valuable treasure of Lemuria; it possesses a power similar to that of a battery, allowing for the conversion of the power of Lemurians and utilize it for their own purpose. The power is collected from the Lemurian's own life force, taking away their own life in exchange for powering itself up for the purpose of it's master. The Sun was sealed away in a chamber which also contained Lemurian Princess Lilina, the last survivor of the civilization who was placed in there a hundred-thousand years prior to the present day and was sealed away in a casket that allowed her to age one year for every five-thousand, thus making her 20 when she was found by Masumi Inou. After her discovery, she was given the name of "Natsuki Mamiya" and taken along with Masumi's treasure hunting, leaving the artifact there unknowingly.

When Creator King Ryuuwon realized he needed a massive power source to activate his most powerful Wicked Dragon, Grand, he utilized the assistance of the Questers to kidnap Natsuki and take her back to where she was found, where the Sun of Lemuria laid. With the Precious and Natsuki's own power awakening it, he places it within the Wicked Dragon making it nearly unstoppable and easily defeating Ultimate DaiBouken until the rescue of Akashi, Souta and Sakura by their new weapon, the GoGo Voyager. Ryuuwon continued to force Natsuki to charge the Precious with Zubaan protecting her until Masumi finally broke through the brainwashing she had been held under by realizing her true memories were the ones created in the present, not the past. But by the time Natsuki was free, Ryuuwon had enough energy to power Grand through another assault, using the power to even create a fortress to protect the mech. However the full Boukenger team together combined the GoGoVoyager into the fighting form of the mech: DaiVoyager, which made easy work of Grand.

After reclaiming the Sun of Lemuria, it revealed one last purpose to Natsuki: a message left by her parents about the fall of their civilization and about their desire to use the power of the artifact for peace. Natsuki decides to store the Precious away, knowing of her current connections and no longer bound by her past.