Kingdom Hearts is a popular action role-playing video game series produced by the collaboration between Square Enix and Disney.
They all craved the power of Kingdom Hearts for themselves and created Keyblades in the image and likeness of the sword, then clashed in the Keyblade War: darkness conquered the worlds and Kingdom Hearts disappeared. The true χ-sword, destroyed by the war, split into 20 splinters: seven shards of pure light that became the hearts of the seven princesses, and thirteen shards of pure darkness. When the world was revived by the lights within the hearts of the children, the last guardians decided to use the keyblades to defend that light.