Normal Magic games (what I like to call Black-bordered World) have a special force field that protects itself from wacky Un games (what I like to call Silver-bordered World)
It allows you to purchase rare singles from different sellers worldwide and receive them in one package, minimizing shipping fees and customs complications.
You get versatility with Derevi, with Birthing Pod or Winter Orb builds
Planar Void While its true we have Dauthi Voidwalker and cards like Bojuka Bog, Leyline of the Void or Soul-Guide Lantern, I feel this one mana no graveyards, for anyone card just doesn't get played
Invasion of Azgol B-Tier: While not quite as good as Angrath's Rampage or Sheoldred's Edict, two mana is the going rate to make an opponent sacrifice a creature or planeswalker
Hardcasting Archon of Cruelty isn't crazy when you've slowed the game down with a bunch of discard, while having a main plan of putting it into play on turn two or three is also awesome