Changing style without CSS

Hey, i have inegrated wordpress into my site: Ultimate-gamer.org

But i can not use the CSS, so i tried changing the font style by adding a paragraph class with the font style i wanted. But that didn’t do anything. Where do i add the style i want to use without CSS.

I want it to look something like this Test (I did this, making it undynamic, i do not know what file it gather the text from)