The Deck of Many Things has historically been one of those infamous Dungeons & Dragons elements that's a bit like the Tarrasque – something that the party is constantly threatened with, but ultimately comes down to just bluff and bluster, because what Dungeon Master needs that headache? Specifically, the Deck is a long-running mythical artifact in D&D lore that's effectively the ultimate random event generator: pull a card from its rifled depths, and you might be showered in riches, given free use of the Wish spell, get locked outside of the universe, or just have your soul ejected from your body.
Consequently, The Deck is recognised in DM circles as something of a campaign-ruiner, an enormous wrench to throw into any carefully-crafted story, because there's no real planning for what it might do. But now Wizards of the Coast seek to correct that with a weighty new supplement pack themed around The Deck of Many Things in order to make it feel a bit more chaotic good than chaotic evil.
