The listing, MtG Artist Proof ERON The RELENTLESS Very Cool, Check it Out! Magic the Gathering has ended.
Yes, the back of this card is totally blank/white. It is called an artist proof--they are sent to the artist to essentially show them how the end product/final result came out. Therefore, these are obviously way more rare than the actual card. This isn't a card that you would most likely play in a deck anyway, but it is more so for collecting purposes, and really, really cool in my humble opinion. What you see is what you get, let me know if you have any questions and thanks for looking!