Wait Planeswalker arts are based on real models? I didn't know that. What models are Lily and Jace based on?
I'd like to know where he got impression that Planeswalkers are based on models, because I'm pretty sure they designed the costumes and everything for these people based on the already existing artwork. In other words, the woman in the Liliana costume is a hired, well-costumed cosplayer. Her signature is practically worthless, although like Powdered Blackblade I could understand getting it signed if you were there in person as a memento or something.