Elenda has hexproof from instants, giving her protection from your opponents' spells but letting you target her all day long with yours
With cards, people already know the characters to some extent, and they have personal feelings and attachments from playing the games, so you have to make sure there's no disconnect between the pieces and people's expectations
For me, the tipping point is in the card type creatures are just much better than sorceries, adding the utility of attacking and blocking, paying sacrifice and convoke costs and everything else you need a body for in Magic
It examines curves, lines, structure, shading, and depth to understand the full form of the object before generating the 3D model
Like the Pirate's Code from Pirates of the Caribbean, this is more like a set of guidelines than actual rules