Defenders of the Earth (1986)

S01E56 The Necklace of Oros

In her journey toward adulthood, Jedda is taken by the Phantom to the Skull Cave, where she can select a gift from their family's collection of treasures. Captivated by the enigmatic Necklace of Oros, she feels a strong connection to it. However, an ominous interdimensional entity named Graviton seeks the Necklace for his sinister plans and is determined to seize it from her.