Konami added new cards too and a previous report from Jump said there are over 5,500 cards
Additional cards have 3-4 print variations from prerelease kits, theme decks & Toys R Us stamped promos
Since this card and the other most expensive Roaring Moon cards are so new, they're fairly easy to find in NM condition, and it's usually worth investing in the best possible condition if you're concerned with your card's long-term value
For instance: Creatures (16) Lands (22) Spells (22) Sideboard Kotiranta knew his opponents would have a lot of sideboard hate for his fast black aggro deck, but Entomb + Reanimation spells + Vampiric Tutor to help set it up, let him transform into a combo deck that would surprise people with a quick Avatar of Woe or Phantom Nishoba, leaving them looking at the Shock in their hand in disbelief
(Some effects from cards in previous sets may cause these to transform while on the battlefield, though these effects are unusual.) Double-faced cards haven't changed since the last time we saw them in Innistrad: Crimson Vow