Its more or less the definition of fine. Chaos Defiler is a fairly substantial threat that comes with a more versatile removal effect than Dreadbore stapled on with it enters the battlefield or dies
Between the absurd offensive potential of Emrakul and the extra turn it provides, it is not uncommon for a game to be won shortly after (if not immediately after) Emrakul, the Aeon's Torn is cast
There are some great rooms to visit, but I'd be sure to visit Ebonlake Grotto for two faerie dragons, and the reward for venturing eight times is either an anthem/trample enabler, huge burn based on four cards' worth of mana value, or a one-sided board wipe
It destroys all creatures without the possibility of being countered and is particularly effective against aggro and midrange decks
Due to the value of the cards, all reserve list card alter orders will have a required signature added to shipping costs
Mix all of that together, then add a sprinkling of the stock problems that publisher Ravensburger had with The First Chapter, where demand far exceeded supply for several months after release, and you have the perfect recipe for very valuable cards indeed