Black Clover, as exciting as it is, has been a very slow moving anime thus far. Leaving us constantly wanting more, and expecting something awesome to happen that never really does. But here we have the current Wizard King, Julius, making moves and making the current villains look like little ants.
I feel we are going to start moving into a little more serious combat/storyline. I hope to see this demon that is lurking inside of Asta soon as well.
From what I have gathered, the Wizard King controls 'light magic' enabling him to control time as well. I am VERY excited to see more of his overwhelming power.