Looking for Bl Manhwa (historical, maybe magical?!)

When MC was younger, he was a crown prince. He has a younger child as a best friend; he was very friendly n cute (black haired). Something happened, that black haired child became the crown prince instead n MC was kicked out of the palace. I think it's cuz the MC didn't have enough magical powers n the child has powerful one??!! He then grew up in poverty n people made fun of him. Few years passed, MC is brought back into the palace for some reasons n the black haired; who's now cold af.