Filet crochet is a very peaceful pastime. I print my graph and with a highlighter marker & mark off each row as I go. I also used an extended DC to keep my squares tall enough which lengthens the project time, but would otherwise result in short and fat squares and ultimately a short fat design.
The Dragon was worked in sz. 10 bedspread weight white cotton with a #7 hook.
The pattern can be found here:
Dragon Walking Upright