Hi
First of all you are not going to get somebody to do it for free. There are a number of artists who use this site and that is how they make their living – drawing art and selling it.
Then even if you do pay an artist the tattoo artist is only going to alter the image to suit their style. So you pay twice.
Use google images and get images of lions, winged lions, gryphons etc and take them to the artist you want to do your ink.
Tell them what you like about the images and they will draw it as part of the tattoo cost.
Take care
Matthew