Three mana to pull this out in the late game is more than enough value to make Dakkon an auto-include in your Esper artifacts decks, and its built-in surveil ability and creature removal make it a great early play as well
Razaketh, the Foulblooded is an eight mana Black 8/8 with flying and trample
Battle of Frost and Fire - The big notice here is that if you can have enough dragons survive the 4 damage wrath effect, and time it right, you can end up drawing a good couple of cards, on top of being a one-sided wipe, when it hits the third lore
Expect these prices to fluctuate a lot , but Im curious what the return of cards like Doubling Season and Omniscience to Standard is going to do for the price of older printings
Special Art Cards Chance to pull borderless alternate-art designs
Otherwise, its always at least a 0 mana artifact for Urza, Lord High Artificer that can produce extra Mox Sapphires if youve got mana lying around to begin with