The number of card types is not rechecked as the ability resolves
These are transforming double-faced cards that emulate the flavor of a human turning into a werewolf at nightfall on the plane of Innistrad, Magics gothic horror plane, an unsettling place where vampires, spirits, zombies, and werewolves own the night
That being said, however, recent statements from Hasbro CEO Chris Cocks heavily imply that Wizards is working on implementing the format
Each card includes useful details such as card type, mana cost, oracle text, set information, prices, and more
You can also extend the concept by playing cards like Mizzix, Replica Rider, Vega, the Watcher, Keeper of Secrets, and Flaming Tyrannosaurus, which reward you for playing cards from any zone other than your hand
Izzet and Abzan: Dalakos, Crafter of Wonders and Thalia and The Gitrog Monster Not all pairs are created equal