This is not one of my more pricey lists, but if you wanted to trim the budget down you could probably save $100 USD just by dropping Coat of Arms, Cyclonic Rift, Necroduality, Nykthos, Shrine to Nyx and Rhystic Study
The DCI, as google tells me, is the governing body behind things like banned cards, restricted cards and the way that the competitive gameplay is governed, and the artwork (done by Maro?) is just a scribbled dude in a blindfold holding a mug of beer tossing darts at cards on a dartboard as a self-deprecating way to show off the "rigorous decision-making process" that the DCI uses to ban a card
Sandstorm Crasher is like an upgraded version of Felhide Spiritbinder with the downside that it needs to be exerted
The intention for Enlightenment was always for it to functionally extend the range at which allies could have an impact
Winning either contest has become a bragging right
We also have Territory CullerTerritory Culler, which can get more Eldrazi to our hand when we drop lands, and From BeyondFrom Beyond, which can make Scions and be sacrificed to search for an Eldrazi