Three Brother Swords

"The Three Brother Swords are three of the most powerful swords known to the magical community. The may only be wielded by the Three Wielders. And you are them."

-Kyle and Andy talking about the Three Brother Swords.

The Three Brother Swords are the three most powerful swords known to the magical community. The only one known to mortals is Excalibur. Excalibur was a feature in the classic fairytale of King Arthur. The other two swords Amazon and Kaysek are only known to the magic community. The true heirs are Saphire Halliwell, Matthew Halliwell, and Scott Fraher. They are known as the Three Wielders.

The Removal of The True Destiny
The destiny was orginally supposed to go to Wyatt, Chris, and Melinda Halliwell. But the Elders removed any future callings or any destinies connected to the Charmed children. However, this destiny was not removed entirely. It was postponed, and given to the next generation. Most would think Scarlett should have accepted this destiny instead of Scott, but in the true destiny it had to be two boys and a girl, not the other way around.

Excalibur
Matthew Halliwell is the wielder of Excalibur. The true heir is Matt's father Wyatt Halliwell. But because of the situation with the Elders it was passed down to Wyatt's heir or child. While in possesion of Excalibur, he gains the powers of Calling, Immunity to potions and spells, and Invincibility. Matt also gains the powers of Pyrokinesis and Thermokinesis due to his strong connection to being a witch.

Amazon
Saphire Halliwell is the wielder of Amazon. The true heir is Saphire's father Chris Halliwell. But because of the situation with the Elders, it was passed down to Chris's heir or child. While in possesion of Amazon, she gains the powers of Calling, Immunity to spells and potions, and Invincibility. She also gains the powers of Cyrokinesis and Hydrokinesis because of her strong connection to being a witch.

Kaysek
Scott Halliwell or Scott Fraher is the wielder of Kaysek. The true heir is Scott's mother Melinda Halliwell. But because of the situation with the Elders, it was passed down to Melinda's heir or child. While in possesion of Kaysek, Scott gains the powers of Calling, Immunity to potions and spells, and Invincibility. He also gains the powers of Aerokinesis and Atmokinesis because of his strong connection to being a witch.