Supernatural powers of being Charmed(Supernatural Charmed crossover)

Where are you Cas????

Where we left off is that that Paige and Cas defeated the reaper but before they can celebrate something happens to Cas.
As Cas is ready to leave the veil a bright light flashes which knocks him unconcious.Paige starts to scream as she dosent know what has happened and explains to Sam and Dean what has happened.Everyone begins to panic(Cas is the leader of a civil war and now hes missing).Paige tries to reach her sisters and they answer she explains what happened and the sisters come to the Bunker as fast as they can.They reach there in a couple of hours and sees everyone working the hardest they can to find what has happened.One hour has passed now and they still dont know where Cas is so the witches try a tracking spell but dosent work due to the spell going threw the law of the universe.So Sam and Dean remebers that one time they snuck into the veil but it wasnt easy as they had to do something that can go wrong if not done properly they can die.So explain that the witches must kill them but not in a real way but in a way so they can be brought back with ease.The witches preform the predevil spell witch actually kills a person physically not mentally so they wont die.As Sam and Dean search threw the veil for Cas they find the reaper dead there and also finds Cas angel blade but no Cas to be found so the witches bring them back before they stay dead as if your physical body is dead your mental would start to fade till you become a vengeful spirit as Sam and Dean is leaving they see(to be continued)