Crimson Jewel

 is a weapon in SINoALICE.

Weapon Story
All the boy wanted was his father's approval.

Since his father was a wizard of the royal palace, he decided to study magic.

But just as his efforts were beginning to pay off, his father, seeking power, disappeared into darkness.

With his father gone, the boy lost all purpose. He didn't know what to do. In his desperation, the boy searched through his father's study.

There, he found a strange, glowing jewel.

He thought he might unlock its power with forbidden magic, but he soon realized he didn't have the aptitude for it.

So instead, he studied hard to master crimson magic.

As his abilities grew, he tried to understand where his father had erred. It was then, when he chose the path of light, that he understood the jewel's mutterings.

The country was in flames, and amidst the carnage stood his father. He looked to the sky and cursed his father for being so foolish. The boy surrendered himself to the jewel and defeated the man from which he sprang, but not even torrential downpours could to douse the fire. It burned everything and everyone, destroying the country.