That's a creepy dream!!!! 😓 The black shadow meant the devil was following your dad but you blocked & stopped it or slowed it down so you can protect/defend your dad.
I used to have a dream that an extremely white & gray tall man with huge dark black eyes, straight thick black eyebrows & creepy small gray wrinkly lips, who stood at the end of my bed waiting til I woke up, then he'd attack & kill me. He wore a long black coat & tall black boots. He held a knife & a rope behind his back. He stared at me & waited til I woke up, jumped on me & killed me.
I've been having those dreams since I was 4yrs old. I'm 25 now.