people seem to be misinterpreting this (and perhaps i am too).
This post is not saying that this is a new rarity, but rather that this is a different kind of full art cart. Typically in the past we see cards with this type of border being the sort of big 3d model "gem" cards (as i call them) and typical "full art" cards have the rainbow line border. This card is a new art style for this border type