I watch the TV Series called Jai Jai Jai Bajrang Bali.
There Ravana (king of Lanka) tries to stop Kaal Purush after Kaal Purush denies to answer Ravana's questions. He is shown as a person who rides on a black horse and moves across the universe continuously. He carries a black staff.
I tried finding online about him but couldn't find any.
Who is Kaal Purush?