There are a few ways that I tell people when they have this question. 1. If you are an artist, you can sketch it out and then pen the lines dark and scan it to send to me. 2. If you know an artist, you can have them make the image for you. 3. I have an artist I can refer you to, who can take your idea and make it into line art (I've used her for my planeswalker artwork that will be coming out soon), she charges $10 per image usually and gets them done in under a week unless she is super backed up. OR 4. Search the web, I use google with advanced search on and under usage rights select (free to use,share or modify non-commercially). Those are the best ways I know to find art pieces without violating another person's Copyrights.