You can start if you have a Namazu Merchant on the battlefield, at least 6 cards in your graveyard, and a total of 15 mana (Blue Blue Blue Blue Black Black Black Black and 7 colorless)
Some more spoilers were posted in this article on the mechanics of Conspiracy: Take the Crown (I highly recommend reading as Conspiracy: Take the Crown has some major differences from regular Magic: The Gathering games)
This helps players learn threat assessment and also helps them feel like theyre never out of a game just because an opponent played a strong card
The primary value here is deck-building nostalgia and the prestige of running original-print cards
Rarity Leader Card x 1, Super Rare x 2, Rare x 3, Common x 8, Uncommon x 1
FromTheShire: This is one of those great cards that doesn't seem QUITE threatening enough to demand immediate spot removal for a lot of players, but will snowball very quickly if left on the table