Then copy each card exiled with Arcane Bombardment
These are by far the most powerful cards and lock your opponents out the hardest
Its a reset button that leaves almost nothing standing, making it a powerful closer for black decks that excels in long, grindy games
It costs a lot of mana but lets you storm off in the late game if you have Lessons in your graveyard along with a cost reducer like Goblin Electromancer
This is also a card on the Reserved List, meaning that it is one of the cards that will never be printed again in order to preserve the value of existing cards
While the pricest versions of these cards are the serialized versions, of which there are only 250 of each Eldrzi titan, the normal concept Edlrazi foils catch a pretty penny to with the foil concept version of Ulamog going for $200, and who knows what the serialized ones will go for (though it won't approach the One Ring's price)