The card in question is a misprinted enchanted black card with only the word visible on it being " Discard ." Although such occurrences are extremely rare, misprints do occasionally happen during trading card production, creating rare unplayable cards, and they sometimes make it past quality control and into customers' hands
As well as that they have huge amounts of cards from older sets going all the way back to Base Set, so there's really something for everyone regardless if you're a player or collector
Its a good place to run March of the Machines for infinite ETBs
Thundering Hurricane, although luck based can be a massive game changer, along with a one cost retreat, Zapdos is a great addition to any electric deck
Crypt Ghast was one of the MVPs and led to sick plays when I could stick him on the battlefield
So it's Forbidden Mountain - Maleficent's Castle