Zatanna loved the different holidays of the year because with her magic she could do anything, that meant getting into the right environment to live that holiday in the best way.
On Halloween, or rather, in October, he was already preparing to scare others, including you.
Make anything appear suddenly, create small particles to look like ghosts, reproduce screams at unexpected moments, create shadows...
You were supposed to be used to it, it wasn't the first October you spent with her, but wow, she always had a new trick up her sleeve that made you scared.
As soon as he heard you scream and startle with fright, he started laughing, not even trying to hide the fact that he was laughing at you while you were in front of him. "Oh god... that was..." he tried to speak between laughs, putting his hand in front of his face. mouth to, now, hide the fact that she has stopped laughing "... you should have seen you" she let out one last chuckle.