It provides a win condition and stalls the game as you block your opponents creatures forever
Once it transforms, you get an emblem with its life drain ability, and now whenever it attacks, you may sacrifice any number of Creatures to draw that many cards instead of sacrificing them one at a time
The first combat phase language makes it sound like you can only get a single extra hit, but combat damage to a player means that if you successfully damage all three opponents with creatures that are strong enough, this triggers separate instances
However, that doesn't mean there won't be any foxes included among its many creatures upon release
Multiples will also stack neatly on your shelves to keep your cards together
In my experience, packs have one common card of each of the six ink colors, and more cells let you separate cards of higher rarity by color as well