Casting Ulamog, the Ceaseless Hunger or Kozilek, the Great Distortion is already a great payoff, so youll want other expensive spells as well like Kozilek's Command and It That Betrays to make use of all the ramp
25 Tamatoa - Happy As A Clam Achazia's Island, Enchanted, Value $201 Tamatoa's Happy as a Clam from March's Archazia's Island set kicks off our list, coming in at around $200
Creature Artifact - Construct Color tag templates(None) Color tag templates(None) Vedalken Engineer : Add two mana of any one color
Victim of Night would be the best, but its double black is not trivial for a deck with Mutavaults and Islands, and it has a few misses anyway (speaking of Mutavaults)
What attacks does Mega Charizard X ex have
Its been a small but significant part of Magics lore since the very first set and will continue to be for a long time yet