It seems this dream/vision is from God. A revelation of somekind of evil works performing in that church. Keep praying and the Lord will show you who is doing it. That church needs a lot of prayers against the enemy...
I will pray also the Lord give you the wisdom about this.
May the Lord bless you and keep you and His shalom be with you,
As soon I read your post yesterday I write a response to you, but I did not sent it until today ( thusrday ). I was rethinking to send it or not and then I decided to do it but it seems was not on time.
I'm praying for you and the church.