Creatures that cost nine mana: Few creatures in Magic are bigger than the Eldrazi titans themselves
You could also run him as a random value two-drop in the Xathrid Necromancer deck, which might make Pain Seer a $3 or $4 card but not a $12 one
At the beginning of each players draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles
Combine with ST-10 to build a powerful deck
Whatever the answer, we're excited to see what the rest of the deck holds, when Wizards of the Coast (or, perhaps, Mr Mystery Buyer) decides to show it off
Lotho, Corrupt Shirriff Lotho, Corrupt Shirriff can create Treasure for you during each players turn, which can give you a quick leg up in the game