Yami Sukehiro is one of the strongest characters in Black Clover. While we all figured Asta would surpass him someday as the main character, the question was always “when”. Well in the demon triad arc I would say Asta finally pulled this off. His demonic fusion form is just too much even for Yami’s dark magic to withstand. Asta can now nullify all magic as well as absorb it and his speed is just incredible. It’s hard to see Yami standing up to that much power. Asta wins.