Supernatural powers of being Charmed(Supernatural Charmed crossover)

Sacrifice

Since we last met the team learned that the Charmed witches learned that their older sister Prue was alive.
Prue said that the whole time before the beginning of time God had a plan to make her the source of all of the Halliwell witches power so when she died she remembered what her father told her jobs was to do so the whitelighters kept her soul under heavy guard so she can provide her sister her powers.So when the witches attempted to the trifecta this accually revived her with all of her sister powers and enhance ment of hers to combat the evil.But the trifecta is only able to maintain her physical form for a couple of moments before she disappears giving back her sisters her power.Sam and Dean was confused by the fact of not knowing that she was their sister but they thanked her also Castiel thanked her before he was called upon God on his personal radio to him to protect Prue for her journey back to heaven so she can continue supplying her sisters.But Castiel after guiding her to heaven instead had the Charmed witches and another witch named Rowena cast a spell that could prevent anyone or anything from ever entering the cage or opening it but at the cost of his mind being erased.They casted the spell and Cas mind was erased but Sam and Dean dont know about this because Cas knew that they would try to stop him from doing this.So it was up to the Charmed sister to tell them.When they told them Dean was extremly furious and told them to bring him back but the they told him that it is perminent and could never bring back Cas.Dean went into a deep depression Cas was his best friend they fought in wars and cant believe hes finally gone.But as they are sad and the witches trying to perfect their trifecta.Not knowing that...(to be continued)