Breach the Multiverse costs seven, has each player mill ten, and you can choose a dork/planeswalker from each graveyard and send it to your side
The guaranteed floor per box is the key difference
Conversion Apparatus Another lovely entry in the genre of what does a three-cost mana rock have to do to see play and spoilers, I think this one definitely makes it over that bar
These arent as sought after as first editions, but demand is still pretty high, especially for the chase cards like Charizard
You cant expect this to be sustainable because your opponents will interact, but it can create a huge burst of counters to make a lethal board state from nothing, especially if you sink mana from lands into Bill first
According to the PSA, a gem mint card is worth about $20,000