This deck is all about resolving an Underworld Dreams and then letting your opponent draw themselves to death. Of course that would take some time if you don't help them on their way, therefore you play cards like Wheel of Fortune, Winds of Change and sometimes also Howling Mine. If you want, you can also pair the Howling Mine with Relic Barrier.
The deck usually complements the main plan with a bunch of Lightning Bolts which can be used both as creature removal or for extra reach so that you can finish of the opponent after Underworld Dreams has done its thing.
Sometimes this decks contain a couple of creatures for another angle of attack but it can also be built completely without creatures so you can play a couple of The Abyss.