Mark Rosewater discussed this on his blog, stating that Wizards of the Coast does not control the ban list, and they are not restricted by it either
Flotsam / Jetsam With Flotsam // Jetsam, you have to decide between paying 6 mana and casting a spell from everyone elses graveyard or milling three cards and investigating
Commanded by the Wise Mothman, this deck builds up powerful creatures and churns through your opponents' decks with powerful mill effects, courtesy of the delightfully flavorsome Radiation mechanic
Youll certainly use it to punch out of a tough situation, but youll most often want to use it as Wrath of God
Is Channel the Bleak Expanse legal to play
Rather than being bitter about it, you can just cast Storm of Souls to bring back every creature in your graveyard