WUB Felidar Sovereign
4 Serra Ascendant
2 Divinity of Pride
1 Felidar Sovereign
4 Chancellor of the Dross
4 Swords to Plowshares
3 Dromar's Charm
4 Careful Study
1 Buried Alive
2 Illusions of Grandeur
4 Dark Ritual
4 Arcane Sanctum
4 Underground Sea
How does the deck work?
The deck is equal parts reanimator and control. A typical game will have you playing Duress, Swords to Plowshares, Careful Study, and/or Serra Ascendant on your 1st and 2nd tuns. You then want to play Exhume, Buried Alive, and/or Illusions of Grandeur on your 2nd, 3rd, and 4th turns. That being said, there's obviously the chance of getting lucky and drawing a double Dark Ritual + Divinity of Pride in your opening hand. (Note: Any opening hand with a Dark Ritual or Careful Study is usually a good hand.)
The reason why there is only a single copy of Felidar Sovereign is because, on its own, it's the worst creature in the deck. Unless you're threatening to break 40+ life any time soon, it's almost always better to have any of the other creatures in play.
How does this deck differ from similar decks out there?
When trying to make the "Felidar Sovereign Deck" work this time around, I took a different approach. The trick was to view both Serra Ascendant and Chancellor of the Dross and 6/6 flying, lifelink creatures that only differ by the means they get onto the battlefield. In truth, this deck is less of a "Felidar Sovereign Deck" and more of a "8x 6/6 Flying Lifelink Deck." Once that was clear, the rest of the deck just fell into place.
Careful Study and Unmask get rid of excess Chancellors. Exhume always leaves open the threat of a 2nd turn chancellor. Buried Alive makes it possible to only run a single Felidar Sovereign. Dromar's Charm is a good piece of control, but it also acts as instant life gain. And Illusions of Grandeur can change the game immediately when it comes into play.
What is your favorite thing about the deck?
I've attempted at adding blue to my gain life decks in the past for Illusions of Grandeur, but I forgot all about Dromar's Charm. Everyone knows it as a hard counter spell and spot removal, but in this deck the life gain at instant speed can put Serra Ascendant, Divinity of Pride, and Felidar Sovereign over the top.
I also have to mention that with so many huge flying creatures, it's likely that if you're winning, you'll probably kill your opponent before you get 40 life on your next upkeep (for the Felidar Sovereign win condition). Both the Chancellor of the Dross and Illusions of Grandeur keep the possibility of that win condition alive. If that win condition wasn't possible, I might as well be playing a more effective reanimator.